diff --git a/src/digraph.c b/src/digraph.c
index f19e58e..32b36be 100644
--- a/src/digraph.c
+++ b/src/digraph.c
@@ -2115,18 +2115,15 @@
 # ifdef FEAT_DIGRAPHS
     int     flag_list_all;
 
-    if (in_vim9script() && check_for_opt_bool_arg(argvars, 0) == FAIL)
+    if (check_for_opt_bool_arg(argvars, 0) == FAIL)
 	return;
 
     if (argvars[0].v_type == VAR_UNKNOWN)
 	flag_list_all = FALSE;
     else
     {
-	int	    error = FALSE;
-	varnumber_T flag = tv_get_number_chk(&argvars[0], &error);
+	varnumber_T flag = tv_get_bool(&argvars[0]);
 
-	if (error)
-	    return;
 	flag_list_all = flag ? TRUE : FALSE;
     }