diff -up ./src/php/ext/grpc/call.c.php85 ./src/php/ext/grpc/call.c
--- ./src/php/ext/grpc/call.c.php85	2025-07-17 10:28:12.598376396 +0200
+++ ./src/php/ext/grpc/call.c	2025-07-17 10:28:45.097057429 +0200
@@ -84,7 +84,7 @@ zval *grpc_parse_metadata_array(grpc_met
     if (php_grpc_zend_hash_find(array_hash, str_key, key_len, (void **)&data)
         == SUCCESS) {
       if (Z_TYPE_P(data) != IS_ARRAY) {
-        zend_throw_exception(zend_exception_get_default(TSRMLS_C),
+        zend_throw_exception(zend_ce_exception,
                              "Metadata hash somehow contains wrong types.",
                              1 TSRMLS_CC);
         efree(str_key);