diff --git a/src/commit.c b/src/commit.c
index 00e18b832..dc9e5362a 100644
--- a/src/commit.c
+++ b/src/commit.c
@@ -225,7 +225,7 @@ int commit_parse_buffer(git_commit *commit, const void *data, size_t len)
 
 	if (git__prefixcmp(buffer, "encoding ") == 0) {
 		const char *encoding_end;
-		buffer += STRLEN("encoding ");
+		buffer += strlen("encoding ");
 
 		encoding_end = buffer;
 		while (encoding_end < buffer_end && *encoding_end != '\n')
diff --git a/src/config_file.c b/src/config_file.c
index 840817c33..520a806b5 100644
--- a/src/config_file.c
+++ b/src/config_file.c
@@ -264,7 +264,7 @@ static char *interiorize_section(const char *orig)
 	len = dot - orig;
 	memcpy(section, orig, len);
 	section += len;
-	len = STRLEN(" \"");
+	len = strlen(" \"");
 	memcpy(section, " \"", len);
 	section += len;
 	len = last_dot - dot - 1;
diff --git a/src/indexer.c b/src/indexer.c
index bef62a23d..3934250e2 100644
--- a/src/indexer.c
+++ b/src/indexer.c
@@ -176,11 +176,11 @@ static void index_path(char *path, git_indexer *idx)
 
 	ptr = strrchr(path, '/') + 1;
 
-	memcpy(ptr, prefix, STRLEN(prefix));
-	ptr += STRLEN(prefix);
+	memcpy(ptr, prefix, strlen(prefix));
+	ptr += strlen(prefix);
 	git_oid_fmt(ptr, &idx->hash);
 	ptr += GIT_OID_HEXSZ;
-	memcpy(ptr, suffix, STRLEN(suffix));
+	memcpy(ptr, suffix, strlen(suffix));
 }
 
 int git_indexer_write(git_indexer *idx)
@@ -199,7 +199,7 @@ int git_indexer_write(git_indexer *idx)
 
 	namelen = strlen(idx->pack->pack_name);
 	memcpy(filename, idx->pack->pack_name, namelen);
-	memcpy(filename + namelen - STRLEN("pack"), "idx\0", STRLEN("idx\0"));
+	memcpy(filename + namelen - strlen("pack"), "idx", strlen("idx") + 1);
 
 	error = git_filebuf_open(&idx->file, filename, GIT_FILEBUF_HASH_CONTENTS);
 
diff --git a/src/odb_pack.c b/src/odb_pack.c
index fc2408e76..5b2be58e1 100644
--- a/src/odb_pack.c
+++ b/src/odb_pack.c
@@ -237,7 +237,7 @@ static int packfile_load__cb(void *_data, char *path)
 
 	for (i = 0; i < backend->packs.length; ++i) {
 		struct git_pack_file *p = git_vector_get(&backend->packs, i);
-		if (memcmp(p->pack_name, path, strlen(path) - STRLEN(".idx")) == 0)
+		if (memcmp(p->pack_name, path, strlen(path) - strlen(".idx")) == 0)
 			return GIT_SUCCESS;
 	}
 
diff --git a/src/pack.c b/src/pack.c
index 4b43e7cf1..d882516be 100644
--- a/src/pack.c
+++ b/src/pack.c
@@ -196,7 +196,7 @@ static int pack_index_open(struct git_pack_file *p)
 		return GIT_SUCCESS;
 
 	idx_name = git__strdup(p->pack_name);
-	strcpy(idx_name + strlen(idx_name) - STRLEN(".pack"), ".idx");
+	strcpy(idx_name + strlen(idx_name) - strlen(".pack"), ".idx");
 
 	error = pack_index_check(idx_name, p);
 	free(idx_name);
@@ -614,7 +614,7 @@ int git_packfile_check(struct git_pack_file **pack_out, const char *path)
 	 * Make sure a corresponding .pack file exists and that
 	 * the index looks sane.
 	 */
-	path_len -= STRLEN(".idx");
+	path_len -= strlen(".idx");
 	if (path_len < 1) {
 		free(p);
 		return git__throw(GIT_ENOTFOUND, "Failed to check packfile. Wrong path name");
diff --git a/src/pkt.c b/src/pkt.c
index 516800bcb..f802bbd5d 100644
--- a/src/pkt.c
+++ b/src/pkt.c
@@ -267,7 +267,7 @@ int git_pkt_send_flush(int s)
 {
 	char flush[] = "0000";
 
-	return gitno_send(s, flush, STRLEN(flush), 0);
+	return gitno_send(s, flush, strlen(flush), 0);
 }
 
 static int send_want_with_caps(git_remote_head *head, git_transport_caps *caps, int fd)
@@ -279,7 +279,7 @@ static int send_want_with_caps(git_remote_head *head, git_transport_caps *caps,
 	if (caps->ofs_delta)
 		strcpy(capstr, GIT_CAP_OFS_DELTA);
 
-	len = STRLEN("XXXXwant ") + GIT_OID_HEXSZ + 1 /* NUL */ + strlen(capstr) + 1 /* LF */;
+	len = strlen("XXXXwant ") + GIT_OID_HEXSZ + 1 /* NUL */ + strlen(capstr) + 1 /* LF */;
 	cmd = git__malloc(len + 1);
 	if (cmd == NULL)
 		return GIT_ENOMEM;
@@ -302,10 +302,10 @@ int git_pkt_send_wants(git_headarray *refs, git_transport_caps *caps, int fd)
 {
 	unsigned int i = 0;
 	int error = GIT_SUCCESS;
-	char buf[STRLEN(WANT_PREFIX) + GIT_OID_HEXSZ + 2];
+	char buf[strlen(WANT_PREFIX) + GIT_OID_HEXSZ + 2];
 	git_remote_head *head;
 
-	memcpy(buf, WANT_PREFIX, STRLEN(WANT_PREFIX));
+	memcpy(buf, WANT_PREFIX, strlen(WANT_PREFIX));
 	buf[sizeof(buf) - 2] = '\n';
 	buf[sizeof(buf) - 1] = '\0';
 
@@ -332,8 +332,8 @@ int git_pkt_send_wants(git_headarray *refs, git_transport_caps *caps, int fd)
 		if (head->local)
 			continue;
 
-		git_oid_fmt(buf + STRLEN(WANT_PREFIX), &head->oid);
-		error = gitno_send(fd, buf, STRLEN(buf), 0);
+		git_oid_fmt(buf + strlen(WANT_PREFIX), &head->oid);
+		error = gitno_send(fd, buf, strlen(buf), 0);
 		return git__rethrow(error, "Failed to send want pkt");
 	}
 
@@ -350,13 +350,13 @@ int git_pkt_send_have(git_oid *oid, int fd)
 {
 	char buf[] = "0032have 0000000000000000000000000000000000000000\n";
 
-	git_oid_fmt(buf + STRLEN(HAVE_PREFIX), oid);
-	return gitno_send(fd, buf, STRLEN(buf), 0);
+	git_oid_fmt(buf + strlen(HAVE_PREFIX), oid);
+	return gitno_send(fd, buf, strlen(buf), 0);
 }
 
 int git_pkt_send_done(int fd)
 {
 	char buf[] = "0009done\n";
 
-	return gitno_send(fd, buf, STRLEN(buf), 0);
+	return gitno_send(fd, buf, strlen(buf), 0);
 }
diff --git a/src/remote.c b/src/remote.c
index d54d8c7d8..74c5afad5 100644
--- a/src/remote.c
+++ b/src/remote.c
@@ -93,7 +93,7 @@ int git_remote_get(git_remote **out, git_config *cfg, const char *name)
 	}
 
 	/* "fetch" is the longest var name we're interested in */
-	buf_len = STRLEN("remote.") + STRLEN(".fetch") + strlen(name) + 1;
+	buf_len = strlen("remote.") + strlen(".fetch") + strlen(name) + 1;
 	buf = git__malloc(buf_len);
 	if (buf == NULL) {
 		error = GIT_ENOMEM;
diff --git a/src/repository.c b/src/repository.c
index c0e99bb24..0e7d1972a 100644
--- a/src/repository.c
+++ b/src/repository.c
@@ -449,12 +449,12 @@ static int read_gitfile(char *path_out, const char *file_path, const char *base_
 	for (;data[end_offset] == '\r' || data[end_offset] == '\n'; --end_offset);
 	data[end_offset + 1] = '\0';
 
-	if (STRLEN(GIT_FILE_CONTENT_PREFIX) == end_offset + 1) {
+	if (strlen(GIT_FILE_CONTENT_PREFIX) == end_offset + 1) {
 		git_futils_freebuffer(&file);
 		return git__throw(GIT_ENOTFOUND, "No path in git file `%s`", file_path);
 	}
 
-	data = data + STRLEN(GIT_FILE_CONTENT_PREFIX);
+	data = data + strlen(GIT_FILE_CONTENT_PREFIX);
 	error = git_path_prettify_dir(path_out, data, base_path);
 	git_futils_freebuffer(&file);
 
diff --git a/src/revwalk.c b/src/revwalk.c
index f7a56ccf5..538928cb1 100644
--- a/src/revwalk.c
+++ b/src/revwalk.c
@@ -183,7 +183,7 @@ static commit_object *commit_lookup(git_revwalk *walk, const git_oid *oid)
 
 static int commit_quick_parse(git_revwalk *walk, commit_object *commit, git_rawobj *raw)
 {
-	const int parent_len = STRLEN("parent ") + GIT_OID_HEXSZ + 1;
+	const int parent_len = strlen("parent ") + GIT_OID_HEXSZ + 1;
 
 	unsigned char *buffer = raw->data;
 	unsigned char *buffer_end = buffer + raw->len;
@@ -192,10 +192,10 @@ static int commit_quick_parse(git_revwalk *walk, commit_object *commit, git_rawo
 	int i, parents = 0;
 	long commit_time;
 
-	buffer += STRLEN("tree ") + GIT_OID_HEXSZ + 1;
+	buffer += strlen("tree ") + GIT_OID_HEXSZ + 1;
 
 	parents_start = buffer;
-	while (buffer + parent_len < buffer_end && memcmp(buffer, "parent ", STRLEN("parent ")) == 0) {
+	while (buffer + parent_len < buffer_end && memcmp(buffer, "parent ", strlen("parent ")) == 0) {
 		parents++;
 		buffer += parent_len;
 	}
@@ -208,7 +208,7 @@ static int commit_quick_parse(git_revwalk *walk, commit_object *commit, git_rawo
 	for (i = 0; i < parents; ++i) {
 		git_oid oid;
 
-		if (git_oid_fromstr(&oid, (char *)buffer + STRLEN("parent ")) < GIT_SUCCESS)
+		if (git_oid_fromstr(&oid, (char *)buffer + strlen("parent ")) < GIT_SUCCESS)
 			return git__throw(GIT_EOBJCORRUPTED, "Failed to parse commit. Parent object is corrupted");
 
 		commit->parents[i] = commit_lookup(walk, &oid);
diff --git a/src/tag.c b/src/tag.c
index 1a79d92df..21bc3c726 100644
--- a/src/tag.c
+++ b/src/tag.c
@@ -388,7 +388,7 @@ typedef struct {
   const char *pattern;
 } tag_filter_data;
 
-#define GIT_REFS_TAGS_DIR_LEN STRLEN(GIT_REFS_TAGS_DIR)
+#define GIT_REFS_TAGS_DIR_LEN strlen(GIT_REFS_TAGS_DIR)
 
 static int tag_list_cb(const char *tag_name, void *payload)
 {
diff --git a/src/transport_git.c b/src/transport_git.c
index 88ad7a901..c6e1f33a1 100644
--- a/src/transport_git.c
+++ b/src/transport_git.c
@@ -73,7 +73,7 @@ static int gen_proto(char **out, int *outlen, const char *cmd, const char *url)
 	if (cmd == NULL)
 		cmd = default_command;
 
-	len = 4 + strlen(cmd) + 1 + strlen(repo) + 1 + STRLEN(host) + (delim - url) + 2;
+	len = 4 + strlen(cmd) + 1 + strlen(repo) + 1 + strlen(host) + (delim - url) + 2;
 
 	*out = git__malloc(len);
 	if (*out == NULL)
@@ -148,7 +148,7 @@ static int do_connect(transport_git *t, const char *url)
 	int error, connected = 0;
 
 	if (!git__prefixcmp(url, prefix))
-		url += STRLEN(prefix);
+		url += strlen(prefix);
 
 	error = extract_host_and_port(&host, &port, url);
 	s = gitno_connect(host, port);
@@ -242,7 +242,7 @@ static int detect_caps(transport_git *t)
 
 		if(!git__prefixcmp(ptr, GIT_CAP_OFS_DELTA)) {
 			caps->common = caps->ofs_delta = 1;
-			ptr += STRLEN(GIT_CAP_OFS_DELTA);
+			ptr += strlen(GIT_CAP_OFS_DELTA);
 			continue;
 		}
 
@@ -474,9 +474,9 @@ static int store_pack(char **out, gitno_buffer *buf, git_repository *repo)
 	strcpy(path, repo->path_repository);
 	off += strlen(repo->path_repository);
 	strcat(path, suff);
-	//memcpy(path + off, suff, GIT_PATH_MAX - off - STRLEN(suff) - 1);
+	//memcpy(path + off, suff, GIT_PATH_MAX - off - strlen(suff) - 1);
 
-	if (memcmp(buf->data, "PACK", STRLEN("PACK"))) {
+	if (memcmp(buf->data, "PACK", strlen("PACK"))) {
 		return git__throw(GIT_ERROR, "The pack doesn't start with the signature");
 	}
 
diff --git a/src/transport_local.c b/src/transport_local.c
index 3d72a1b68..ab0922cf2 100644
--- a/src/transport_local.c
+++ b/src/transport_local.c
@@ -31,7 +31,7 @@ static int local_connect(git_transport *transport, int GIT_UNUSED(direction))
 
 	/* The repo layer doesn't want the prefix */
 	if (!git__prefixcmp(transport->url, file_prefix))
-		path = transport->url + STRLEN(file_prefix);
+		path = transport->url + strlen(file_prefix);
 	else
 		path = transport->url;
 
@@ -92,7 +92,7 @@ static int add_ref(const char *name, git_repository *repo, git_vector *vec)
 
 	/* And if it's a tag, peel it, and add it to the list */
 	head = git__malloc(sizeof(git_remote_head));
-	peel_len = strlen(name) + STRLEN(peeled);
+	peel_len = strlen(name) + strlen(peeled);
 	head->name = git__malloc(peel_len + 1);
 	ret = p_snprintf(head->name, peel_len + 1, "%s%s", name, peeled);
 	if (ret >= peel_len + 1) {
diff --git a/src/util.h b/src/util.h
index 4a3342017..78f9f8276 100644
--- a/src/util.h
+++ b/src/util.h
@@ -93,8 +93,6 @@ extern char *git__strtok(char **end, const char *sep);
 extern void git__strntolower(char *str, int len);
 extern void git__strtolower(char *str);
 
-#define STRLEN(str) (sizeof(str) - 1)
-
 extern int git__fnmatch(const char *pattern, const char *name, int flags);
 
 /*
diff --git a/tests/t15-config.c b/tests/t15-config.c
index aa5ba28f6..05de25f8c 100644
--- a/tests/t15-config.c
+++ b/tests/t15-config.c
@@ -300,7 +300,7 @@ BEGIN_TEST(config16, "add a variable in a new section")
 
 	/* As the section wasn't removed, owerwrite the file */
 	must_pass(git_filebuf_open(&buf, CONFIG_BASE "/config10", 0));
-	must_pass(git_filebuf_write(&buf, "[empty]\n", STRLEN("[empty]\n")));
+	must_pass(git_filebuf_write(&buf, "[empty]\n", strlen("[empty]\n")));
 	must_pass(git_filebuf_commit(&buf));
 END_TEST