diff --git a/src/librbd/io/ImageDispatchSpec.h b/src/librbd/io/ImageDispatchSpec.h
index 7cdc078a088..dc6a709f05e 100644
--- a/src/librbd/io/ImageDispatchSpec.h
+++ b/src/librbd/io/ImageDispatchSpec.h
@@ -140,7 +140,7 @@ public:
   }
 
   bool were_all_throttled() {
-    return m_throttled_flag & RBD_QOS_MASK;
+    return (m_throttled_flag & RBD_QOS_MASK) == RBD_QOS_MASK;
   }
 
 private: