diff --git a/revision.c b/revision.c
index 8136929..9172eb2 100644
--- a/revision.c
+++ b/revision.c
@@ -2157,7 +2157,7 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
 	} else if (!strcmp(arg, "--unpacked")) {
 		revs->unpacked = 1;
 	} else if (starts_with(arg, "--unpacked=")) {
-		die("--unpacked=<packfile> no longer supported.");
+		die(_("--unpacked=<packfile> no longer supported"));
 	} else if (!strcmp(arg, "-r")) {
 		revs->diff = 1;
 		revs->diffopt.flags.recursive = 1;