diff --git a/modules/lua/mod_lua.c b/modules/lua/mod_lua.c
index ed5c839fe9a..8fc1c6c6c9d 100644
--- a/modules/lua/mod_lua.c
+++ b/modules/lua/mod_lua.c
@@ -498,6 +498,7 @@ static apr_status_t lua_output_filter_handle(ap_filter_t *f, apr_bucket_brigade
                     APR_BRIGADE_INSERT_TAIL(ctx->tmpBucket, pbktOut);
                     rv = ap_pass_brigade(f->next, ctx->tmpBucket);
                     apr_brigade_cleanup(ctx->tmpBucket);
+                    apr_bucket_delete(pbktIn);
                     if (rv != APR_SUCCESS) {
                         return rv;
                     }