1 files changed, 1 insertions, 1 deletions
diff --git a/util/generic/string.h b/util/generic/string.h
index b71bb72304d..bbe340781ac 100644
--- a/util/generic/string.h
+++ b/util/generic/string.h
@@ -861,7 +861,7 @@ public:
         return this->ConstRef();
     }
 
-    operator TStringType&() {
+    operator TStringType&() & {
         return this->MutRef();
     }