diff --git a/revision.c b/revision.c
index 00d5c29bfce18a..923663d52ec48d 100644
--- a/revision.c
+++ b/revision.c
@@ -2303,7 +2303,7 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
 	} else if (skip_prefix(arg, "--ancestry-path=", &optarg)) {
 		struct commit *c;
 		struct object_id oid;
-		const char *msg = _("could not get commit for ancestry-path argument %s");
+		const char *msg = _("could not get commit for --ancestry-path argument %s");
 
 		revs->ancestry_path = 1;
 		revs->simplify_history = 0;