diff --git a/src/common/appbase.cpp b/src/common/appbase.cpp
index a0d2dd9157..2917c634c1 100644
--- a/src/common/appbase.cpp
+++ b/src/common/appbase.cpp
@@ -109,6 +109,13 @@ wxAppConsole::wxAppConsole()
 
 #ifdef __WXDEBUG__
     SetTraceMasks();
+#if wxUSE_UNICODE
+    // In unicode mode the SetTraceMasks call can cause an apptraits to be
+    // created, but since we are still in the constructor the wrong kind will
+    // be created for GUI apps.  Destroy it so it can be created again later.
+    delete m_traits;
+    m_traits = NULL;
+#endif
 #endif
 }