diff --git a/src/syntax.c b/src/syntax.c
index 290b6be..825ef88 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -5987,8 +5987,8 @@
 {
     return (buf->b_syn_patterns.ga_len != 0
 	    || buf->b_syn_clusters.ga_len != 0
-	    || curbuf->b_keywtab.ht_used > 0
-	    || curbuf->b_keywtab_ic.ht_used > 0);
+	    || buf->b_keywtab.ht_used > 0
+	    || buf->b_keywtab_ic.ht_used > 0);
 }
 
 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)