diff --git a/ext/xmlreader/php_xmlreader.c b/ext/xmlreader/php_xmlreader.c
index b4d02c04ab4..271c839eb65 100644
--- a/ext/xmlreader/php_xmlreader.c
+++ b/ext/xmlreader/php_xmlreader.c
@@ -557,6 +557,7 @@ static void php_xmlreader_set_relaxng_schema(INTERNAL_FUNCTION_PARAMETERS, int t
 
 			RETURN_TRUE;
 		} else {
+			xmlRelaxNGFree(schema);
 			php_error_docref(NULL, E_WARNING, "Schema contains errors");
 			RETURN_FALSE;
 		}