diff --git a/src/evalfunc.c b/src/evalfunc.c
index 4aa3b6d..060b5bb 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -431,9 +431,10 @@
     static int
 arg_str_or_nr_or_list(type_T *type, argcontext_T *context)
 {
-    if (type->tt_type == VAR_STRING
-		     || type->tt_type == VAR_NUMBER
-		     || type->tt_type == VAR_LIST)
+    if (type->tt_type == VAR_ANY
+		|| type->tt_type == VAR_STRING
+		|| type->tt_type == VAR_NUMBER
+		|| type->tt_type == VAR_LIST)
 	return OK;
     arg_type_mismatch(&t_string, type, context->arg_idx + 1);
     return FAIL;