diff --git a/VERSION b/VERSION
index e5127d4a..ff3646ef 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-Version 1.99.3 (2011-11-25 21:47:39) dev
+Version 1.99.3 (2011-11-25 21:51:08) dev
diff --git a/gaehandler.py b/gaehandler.py
index 9c00ab19..5ead709a 100755
--- a/gaehandler.py
+++ b/gaehandler.py
@@ -83,6 +83,10 @@ def wsgiapp(env, res):
     if global_settings.web2py_runtime == 'gae:development':
         gluon.admin.create_missing_folders()
 
+    from gluon.custom_import import custom_import_install
+    web2py_path = global_settings.applications_parent # backward compatibility
+    custom_import_install(web2py_path)
+
     return gluon.main.wsgibase(env, res)
 
 
diff --git a/gluon/custom_import.py b/gluon/custom_import.py
index 763b3efd..65bb467d 100644
--- a/gluon/custom_import.py
+++ b/gluon/custom_import.py
@@ -11,8 +11,8 @@ import threading
 def custom_import_install(web2py_path):
         global _web2py_importer
         global _web2py_path
-	if _web2py_path == web2py_path:
-            return  # Already installed
+	if isinstance(__builtin__.__import__, _Web2pyImporter):
+	    return #aready installed
         _web2py_path = web2py_path
         _web2py_importer = _Web2pyImporter(web2py_path)
         __builtin__.__import__ = _web2py_importer