diff --git a/configs/yaf_config_simple.c b/configs/yaf_config_simple.c
index 11796745..fc3b412a 100644
--- a/configs/yaf_config_simple.c
+++ b/configs/yaf_config_simple.c
@@ -226,7 +226,7 @@ PHP_METHOD(yaf_config_simple, offsetUnset) {
 			return;
 		}
 
-		if (Z_TYPE_P(name) != IS_STRING || Z_TYPE_P(name) != IS_STRING) {
+		if (Z_TYPE_P(name) != IS_STRING || !Z_STRLEN_P(name)) {
 			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Expect a string key name");
 			RETURN_FALSE;
 		}