diff --git a/src/generic/datavgen.cpp b/src/generic/datavgen.cpp
index dc0f58a4fe..dd0d2bd523 100644
--- a/src/generic/datavgen.cpp
+++ b/src/generic/datavgen.cpp
@@ -2054,6 +2054,7 @@ bool wxDataViewMainWindow::Cleared()
 void wxDataViewMainWindow::UpdateDisplay()
 {
     m_dirty = true;
+    m_underMouse = NULL;
 }
 
 void wxDataViewMainWindow::OnInternalIdle()