diff --git a/src/eval.c b/src/eval.c
index bfe9f61..fdee008 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -3368,9 +3368,8 @@
 		}
 		else
 		{
-		    where_T where;
+		    where_T where = WHERE_INIT;
 
-		    where.wt_index = 0;
 		    where.wt_variable = TRUE;
 		    res = check_type(want_type, actual, TRUE, where);
 		}