diff --git a/builtin-bundle.c b/builtin-bundle.c
index 0a9b73867f..d1635a0a6b 100644
--- a/builtin-bundle.c
+++ b/builtin-bundle.c
@@ -87,7 +87,7 @@ static int read_header(const char *path, struct bundle_header *header) {
 		if (buffer[len - 1] == '\n')
 			buffer[len - 1] = '\0';
 		if (get_sha1_hex(buffer + offset, sha1)) {
-			warn("unrecognized header: %s", buffer);
+			warning("unrecognized header: %s", buffer);
 			continue;
 		}
 		delim = buffer[40 + offset];
@@ -268,7 +268,7 @@ static int create_bundle(struct bundle_header *header, const char *path,
 		 * from getting output.
 		 */
 		if (!(e->item->flags & SHOWN)) {
-			warn("ref '%s' is excluded by the rev-list options",
+			warning("ref '%s' is excluded by the rev-list options",
 				e->name);
 			continue;
 		}
diff --git a/fast-import.c b/fast-import.c
index bea12151c2..cdd629d6bc 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -1312,7 +1312,7 @@ static int update_branch(struct branch *b)
 
 		if (!in_merge_bases(old_cmit, &new_cmit, 1)) {
 			unlock_ref(lock);
-			warn("Not updating %s"
+			warning("Not updating %s"
 				" (new tip %s does not contain %s)",
 				b->name, sha1_to_hex(b->sha1), sha1_to_hex(old_sha1));
 			return -1;
diff --git a/git-compat-util.h b/git-compat-util.h
index 7534db1267..139fc19108 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -87,7 +87,7 @@
 extern void usage(const char *err) NORETURN;
 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
-extern void warn(const char *err, ...) __attribute__((format (printf, 1, 2)));
+extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 
 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
diff --git a/revision.c b/revision.c
index f23c1d5226..486393cb08 100644
--- a/revision.c
+++ b/revision.c
@@ -486,7 +486,7 @@ static void handle_one_reflog_commit(unsigned char *sha1, void *cb_data)
 			add_pending_object(cb->all_revs, o, "");
 		}
 		else if (!cb->warned_bad_reflog) {
-			warn("reflog of '%s' references pruned commits",
+			warning("reflog of '%s' references pruned commits",
 				cb->name_for_errormsg);
 			cb->warned_bad_reflog = 1;
 		}
diff --git a/usage.c b/usage.c
index 4dc5c77633..f5e652cc76 100644
--- a/usage.c
+++ b/usage.c
@@ -86,7 +86,7 @@ int error(const char *err, ...)
 	return -1;
 }
 
-void warn(const char *warn, ...)
+void warning(const char *warn, ...)
 {
 	va_list params;