diff --git a/playground/charts/ChartSample.h b/playground/charts/ChartSample.h
index 0f1c9f1d..710128bd 100644
--- a/playground/charts/ChartSample.h
+++ b/playground/charts/ChartSample.h
@@ -105,6 +105,6 @@ inline void ChartSample::setSample(
 #ifndef QT_NO_DEBUG_STREAM
 
     class QDebug;
-    QSK_EXPORT QDebug operator<<( QDebug, const ChartSample& );
+    QDebug operator<<( QDebug, const ChartSample& );
 
 #endif