diff --git a/slapos/recipe/generic_zope_zeo_client/__init__.py b/slapos/recipe/generic_zope_zeo_client/__init__.py
index 94e4cf8b9727c99e211521ef79efab42945a22bf..9ccb616c6a6c5aed122075f9ff125763fada86e2 100644
--- a/slapos/recipe/generic_zope_zeo_client/__init__.py
+++ b/slapos/recipe/generic_zope_zeo_client/__init__.py
@@ -115,7 +115,7 @@ class Recipe(GenericBaseRecipe):
       TMPDIR=self.options['tmp-path'],
       HOME=self.options['tmp-path'],
       PATH=self.options['bin-path'],
-      TIMEZONE=self.options['timezone'],
+      TZ=self.options['timezone'],
     )
 
     # longrequestlogger product which requires environment settings