diff --git a/src/common/QskObjectCounter.cpp b/src/common/QskObjectCounter.cpp
index 61d6b6ec..b6f8b585 100644
--- a/src/common/QskObjectCounter.cpp
+++ b/src/common/QskObjectCounter.cpp
@@ -70,7 +70,7 @@ namespace
         int maximum;
     };
 
-    class CounterData final : public QObject
+    class CounterData
     {
       public:
         Counter counter[ 2 ];