diff --git a/src/userfunc.c b/src/userfunc.c
index b33aee7..5a64ccb 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -1718,7 +1718,7 @@
     int		argc = 0;
     int		r = 0;
 
-    range_list_materialize(l);
+    CHECK_LIST_MATERIALIZE(l);
     FOR_ALL_LIST_ITEMS(l, item)
     {
 	if (argc == MAX_FUNC_ARGS - (partial == NULL ? 0 : partial->pt_argc))