diff --git a/main/main.c b/main/main.c
index 9c62aa914e..66f9876b00 100644
--- a/main/main.c
+++ b/main/main.c
@@ -2269,6 +2269,10 @@ int php_module_startup(sapi_module_struct *sf, zend_module_entry *additional_mod
 	zend_startup_modules();
 
 	/* start Zend extensions */
+#ifdef PHP_ENABLE_OPCACHE
+	extern zend_extension zend_extension_entry;
+	zend_register_extension(&zend_extension_entry, NULL);
+#endif
 	zend_startup_extensions();
 
 	zend_collect_module_handlers();