diff --git a/filter/config.Y b/filter/config.Y
index a87fb0e5..dfabddf7 100644
--- a/filter/config.Y
+++ b/filter/config.Y
@@ -1002,6 +1002,15 @@ cmd:
  | UNSET '(' dynamic_attr ')' ';' {
      $$ = f_new_inst(FI_EA_UNSET, $3);
    }
+ | UNSET '(' symbol_known ')' ';' {
+     switch ($3->class) {
+       case SYM_ATTRIBUTE:
+	 $$ = f_new_inst(FI_EA_UNSET, *$3->attribute);
+	 break;
+       default:
+	 cf_error("Can't unset symbol %s", $3->name);
+     }
+ }
  | break_command var_list_r ';' {
     $$ = f_print($2, !!$2, $1);
    }