diff --git a/src/diff.c b/src/diff.c
index 6f48d72a2..d944c65e2 100644
--- a/src/diff.c
+++ b/src/diff.c
@@ -551,15 +551,15 @@ static int diff_list_init_from_iterators(
 	if (!old_iter->ignore_case && !new_iter->ignore_case) {
 		diff->opts.flags &= ~GIT_DIFF_DELTAS_ARE_ICASE;
 
-		diff->strcomp    = strcmp;
-		diff->strncomp   = strncmp;
+		diff->strcomp    = git__strcmp;
+		diff->strncomp   = git__strncmp;
 		diff->pfxcomp    = git__prefixcmp;
 		diff->entrycomp  = git_index_entry__cmp;
 	} else {
 		diff->opts.flags |= GIT_DIFF_DELTAS_ARE_ICASE;
 
-		diff->strcomp    = strcasecmp;
-		diff->strncomp   = strncasecmp;
+		diff->strcomp    = git__strcasecmp;
+		diff->strncomp   = git__strncasecmp;
 		diff->pfxcomp    = git__prefixcmp_icase;
 		diff->entrycomp  = git_index_entry__cmp_icase;
 	}
diff --git a/src/pathspec.c b/src/pathspec.c
index 9632f5f13..fc6547afe 100644
--- a/src/pathspec.c
+++ b/src/pathspec.c
@@ -122,11 +122,11 @@ bool git_pathspec_match_path(
 		fnmatch_flags = FNM_CASEFOLD;
 
 	if (casefold) {
-		use_strcmp  = strcasecmp;
-		use_strncmp = strncasecmp;
+		use_strcmp  = git__strcasecmp;
+		use_strncmp = git__strncasecmp;
 	} else {
-		use_strcmp  = strcmp;
-		use_strncmp = strncmp;
+		use_strcmp  = git__strcmp;
+		use_strncmp = git__strncmp;
 	}
 
 	git_vector_foreach(vspec, i, match) {
diff --git a/src/util.c b/src/util.c
index 7f5043817..3a08d4554 100644
--- a/src/util.c
+++ b/src/util.c
@@ -174,6 +174,36 @@ int git__strtol32(int32_t *result, const char *nptr, const char **endptr, int ba
 	return error;
 }
 
+int git__strcmp(const char *a, const char *b)
+{
+	while (*a && *b && *a == *b)
+		++a, ++b;
+	return (int)(*(const unsigned char *)a) - (int)(*(const unsigned char *)b);
+}
+
+int git__strcasecmp(const char *a, const char *b)
+{
+	while (*a && *b && tolower(*a) == tolower(*b))
+		++a, ++b;
+	return (tolower(*a) - tolower(*b));
+}
+
+int git__strncmp(const char *a, const char *b, size_t sz)
+{
+	while (sz && *a && *b && *a == *b)
+		--sz, ++a, ++b;
+	if (!sz)
+		return 0;
+	return (int)(*(const unsigned char *)a) - (int)(*(const unsigned char *)b);
+}
+
+int git__strncasecmp(const char *a, const char *b, size_t sz)
+{
+	while (sz && *a && *b && tolower(*a) == tolower(*b))
+		--sz, ++a, ++b;
+	return !sz ? 0 : (tolower(*a) - tolower(*b));
+}
+
 void git__strntolower(char *str, size_t len)
 {
 	size_t i;
diff --git a/src/util.h b/src/util.h
index 23d4bc6e9..cb1c4fdc2 100644
--- a/src/util.h
+++ b/src/util.h
@@ -134,6 +134,11 @@ extern int git__bsearch(
 
 extern int git__strcmp_cb(const void *a, const void *b);
 
+extern int git__strcmp(const char *a, const char *b);
+extern int git__strcasecmp(const char *a, const char *b);
+extern int git__strncmp(const char *a, const char *b, size_t sz);
+extern int git__strncasecmp(const char *a, const char *b, size_t sz);
+
 typedef struct {
 	short refcount;
 	void *owner;