diff --git a/src/compiler/fzl_parser.c b/src/compiler/fzl_parser.c
index 5203385..9b3a2e8 100644
--- a/src/compiler/fzl_parser.c
+++ b/src/compiler/fzl_parser.c
@@ -232,7 +232,10 @@ fzl_node_t *parse_postfix(fzl_parser_t *parser)
           fzl_node_t *arg = parse_expression(parser);
           if (!arg)
           {
+            for (size_t i = 0; i < args_count; i++)
+              fzl_freeast(args[i]);
             free(args);
+            fzl_freeast(left);
             return NULL;
           }
 
@@ -252,6 +255,8 @@ fzl_node_t *parse_postfix(fzl_parser_t *parser)
         fzl_token_t *rparen = consume(parser);
         if (!rparen || rparen->type != FZL_TOKTYPE_RPAREN)
         {
+          for (size_t i = 0; i < args_count; i++)
+            fzl_freeast(args[i]);
           free(args);
           fzl_freeast(left);
           snprintf(plast_err, sizeof(plast_err),