diff --git a/fsck.c b/fsck.c
index 80365e6284..1b12e824ef 100644
--- a/fsck.c
+++ b/fsck.c
@@ -100,6 +100,7 @@ static struct {
 	{ NULL, NULL, NULL, -1 }
 };
 #undef MSG_ID
+#undef STR
 
 static void prepare_msg_ids(void)
 {