diff --git a/docs/changes.txt b/docs/changes.txt
index e7ce5694bf..d2fb60c611 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -37,6 +37,8 @@ changes:
   to work with "wxChar *" before use "void *" now (some int parameters were
   also changed to size_t). While wxIPC_TEXT can still be used to transfer 7
   bit text, the new wxIPC_UTF8TEXT format is used for transferring wxStrings.
+  Also notice that connection classes should change the parameter types of
+  their overridden OnExecute() or override a more convenient OnExec() instead.
 
 
 wxODBC and contrib libraries removal
diff --git a/include/wx/ipcbase.h b/include/wx/ipcbase.h
index 56de3c8d35..45c0f44553 100644
--- a/include/wx/ipcbase.h
+++ b/include/wx/ipcbase.h
@@ -129,7 +129,14 @@ public:
   // Callbacks to SERVER - override at will
   virtual bool OnExec(const wxString& WXUNUSED(topic),
                       const wxString& WXUNUSED(data))
-      { return false; }
+  {
+      wxFAIL_MSG( "This method shouldn't be called, if it is, it probably "
+                  "means that you didn't update your old code overriding "
+                  "OnExecute() to use the new parameter types (\"const void *\" "
+                  "instead of \"wxChar *\" and \"size_t\" instead of \"int\"), "
+                  "you must do it or your code wouldn't be executed at all!" );
+      return false;
+  }
 
   // deprecated function kept for backwards compatibility: usually you will
   // want to override OnExec() above instead which receives its data in a more