diff --git a/examples/BLOCKS/BlocksMonitorDemo.h b/examples/BLOCKS/BlocksMonitorDemo.h
index 3656ccccb1..afe45b2031 100644
--- a/examples/BLOCKS/BlocksMonitorDemo.h
+++ b/examples/BLOCKS/BlocksMonitorDemo.h
@@ -972,6 +972,8 @@ private:
     }
 
     //==============================================================================
+    TooltipWindow tooltipWindow;
+
     PhysicalTopologySource topologySource;
     OwnedArray<BlockComponent> blockComponents;
     BlockComponent* masterBlockComponent = nullptr;