diff --git a/Zend/zend_constants.c b/Zend/zend_constants.c
index 0f0af50b662..f1408d0af93 100644
--- a/Zend/zend_constants.c
+++ b/Zend/zend_constants.c
@@ -36,7 +36,9 @@ void free_zend_constant(zval *zv)
 	} else {
 		zval_internal_dtor(&c->value);
 	}
-	STR_RELEASE(c->name);
+	if (c->name) {
+		STR_RELEASE(c->name);
+	}
 	free(c);
 }