diff --git a/cache.h b/cache.h
index 900796c155..5688b263e4 100644
--- a/cache.h
+++ b/cache.h
@@ -962,14 +962,7 @@ extern const struct object_id null_oid;
 
 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 {
-	int i;
-
-	for (i = 0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) {
-		if (*sha1 != *sha2)
-			return *sha1 - *sha2;
-	}
-
-	return 0;
+	return memcmp(sha1, sha2, GIT_SHA1_RAWSZ);
 }
 
 static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2)