diff --git a/trytond/ir/module/module.py b/trytond/ir/module/module.py
index 686743a251..6986536afb 100644
--- a/trytond/ir/module/module.py
+++ b/trytond/ir/module/module.py
@@ -352,8 +352,6 @@ class Module(OSV):
         # iterate through installed modules and mark them as being so
         for name in module_names:
             mod_name = name
-            if name[-4:] == '.zip':
-                mod_name = name[:-4]
             if mod_name in name2module.keys():
                 mod = name2module[mod_name]['en_US']
                 tryton = Module.get_module_info(mod_name)
diff --git a/trytond/modules/__init__.py b/trytond/modules/__init__.py
index 040d81e943..e3d52b56a0 100644
--- a/trytond/modules/__init__.py
+++ b/trytond/modules/__init__.py
@@ -127,8 +127,6 @@ def create_graph(module_list, force=None):
     packages = []
 
     for module in module_list:
-        if module[-4:] == '.zip':
-            module = module[:-4]
         tryton_file = OPJ(MODULES_PATH, module, '__tryton__.py')
         mod_path = OPJ(MODULES_PATH, module)
         if module in ('ir', 'workflow', 'res', 'webdav'):
@@ -285,7 +283,7 @@ def get_module_list():
             if os.path.isdir(OPJ(MODULES_PATH, file)):
                 module_list.append(file)
             elif file[-4:] == '.zip':
-                module_list.append(file)
+                module_list.append(file[-4:])
     for ep in pkg_resources.iter_entry_points('trytond.modules'):
          mod_name = ep.module_name.split('.')[-1]
          module_list.append(mod_name)