diff --git a/Zend/zend_generators.c b/Zend/zend_generators.c
index f4dd33b95cc..8408cc32f47 100644
--- a/Zend/zend_generators.c
+++ b/Zend/zend_generators.c
@@ -125,7 +125,8 @@ ZEND_API void zend_generator_close(zend_generator *generator, zend_bool finished
 		/* always free the CV's, in the symtable are only not-free'd IS_INDIRECT's */
 		zend_free_compiled_variables(execute_data);
 
-		if (EX_CALL_INFO() & ZEND_CALL_RELEASE_THIS) {
+		if ((EX_CALL_INFO() & ZEND_CALL_RELEASE_THIS) &&
+			EXPECTED(GC_TYPE(Z_OBJ(execute_data->This)) == IS_OBJECT)) {
 			OBJ_RELEASE(Z_OBJ(execute_data->This));
 		}