diff --git a/src/gtk/popupwin.cpp b/src/gtk/popupwin.cpp
index f2d3a67520..2ccbf66336 100644
--- a/src/gtk/popupwin.cpp
+++ b/src/gtk/popupwin.cpp
@@ -181,6 +181,9 @@ bool wxPopupWindow::Create( wxWindow *parent, int style )
         return FALSE;
     }
 
+    // Unlike windows, top level windows are created hidden by default.
+    m_isShown = false;
+    
     // All dialogs should really have this style
     m_windowStyle |= wxTAB_TRAVERSAL;
 
diff --git a/src/gtk1/popupwin.cpp b/src/gtk1/popupwin.cpp
index f2d3a67520..2ccbf66336 100644
--- a/src/gtk1/popupwin.cpp
+++ b/src/gtk1/popupwin.cpp
@@ -181,6 +181,9 @@ bool wxPopupWindow::Create( wxWindow *parent, int style )
         return FALSE;
     }
 
+    // Unlike windows, top level windows are created hidden by default.
+    m_isShown = false;
+    
     // All dialogs should really have this style
     m_windowStyle |= wxTAB_TRAVERSAL;