diff --git a/src/syntax.c b/src/syntax.c
index 468dee0..6570e9e 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -4339,7 +4339,7 @@
 		    if (kp_prev == NULL)
 		    {
 			if (kp_next == NULL)
-			    hash_remove(ht, hi);
+			    hash_remove(ht, hi, "syntax clear keyword");
 			else
 			    hi->hi_key = KE2HIKEY(kp_next);
 		    }