diff --git a/src/fileops.c b/src/fileops.c
index b3715dc1a..f101cec32 100644
--- a/src/fileops.c
+++ b/src/fileops.c
@@ -61,7 +61,7 @@ int gitfo_exists(const char *path)
 off_t gitfo_size(git_file fd)
 {
 	struct stat sb;
-	if (fstat(fd, &sb))
+	if (gitfo_fstat(fd, &sb))
 		return git_os_error();
 	return sb.st_size;
 }
diff --git a/src/fileops.h b/src/fileops.h
index dc5b2ce5d..2da4231d0 100644
--- a/src/fileops.h
+++ b/src/fileops.h
@@ -61,12 +61,16 @@ extern int gitfo_creat(const char *path, int mode);
 
 extern int gitfo_read(git_file fd, void *buf, size_t cnt);
 extern int gitfo_write(git_file fd, void *buf, size_t cnt);
+#define gitfo_lseek(f,n,w) lseek(f, n, w)
 extern off_t gitfo_size(git_file fd);
 
 extern int gitfo_read_file(gitfo_buf *obj, const char *path);
 extern void gitfo_free_buf(gitfo_buf *obj);
 extern int gitfo_move_file(char *from, char *to);
 
+#define gitfo_stat(p,b) stat(p, b)
+#define gitfo_fstat(f,b) fstat(f, b)
+
 #define gitfo_unlink(p) unlink(p)
 #define gitfo_rmdir(p) rmdir(p)
 #define gitfo_chdir(p) chdir(p)
diff --git a/src/odb.c b/src/odb.c
index 58840c6f7..8157f9e57 100644
--- a/src/odb.c
+++ b/src/odb.c
@@ -1016,7 +1016,7 @@ static int pack_stat(git_pack *p)
 			p->pack_name) < 0)
 		return GIT_ERROR;
 
-	if (stat(pb, &sb) || !S_ISREG(sb.st_mode))
+	if (gitfo_stat(pb, &sb) || !S_ISREG(sb.st_mode))
 		return GIT_ERROR;
 
 	if (sb.st_size < (3 * 4 + GIT_OID_RAWSZ))