diff --git a/src/OpenGl/OpenGl_FrameStatsPrs.cxx b/src/OpenGl/OpenGl_FrameStatsPrs.cxx
index eb35b2e008..b4ddc31932 100644
--- a/src/OpenGl/OpenGl_FrameStatsPrs.cxx
+++ b/src/OpenGl/OpenGl_FrameStatsPrs.cxx
@@ -143,6 +143,9 @@ void OpenGl_FrameStatsPrs::updateChart (const Handle(OpenGl_Workspace)& theWorks
   const Standard_Integer aNbBins = aStats->DataFrames().Size();
   if (aNbBins <= 1)
   {
+    myChartIndices ->Release (aCtx.get());
+    myChartVertices->Release (aCtx.get());
+    myChartLines   ->Release (aCtx.get());
     return;
   }