diff --git a/src/common/uiactioncmn.cpp b/src/common/uiactioncmn.cpp
index 04fb4477cf..d7c57b78f6 100644
--- a/src/common/uiactioncmn.cpp
+++ b/src/common/uiactioncmn.cpp
@@ -61,8 +61,6 @@ bool wxUIActionSimulator::MouseDragDrop(long x1, long y1, long x2, long y2,
 bool
 wxUIActionSimulator::Key(int keycode, int modifiers, bool isDown)
 {
-    wxASSERT_MSG( (modifiers & wxMOD_ALTGR) != wxMOD_ALTGR,
-        "wxMOD_ALTGR is not implemented" );
     wxASSERT_MSG( !(modifiers & wxMOD_META ),
         "wxMOD_META is not implemented" );
     wxASSERT_MSG( !(modifiers & wxMOD_WIN ),