diff --git a/modoboa_installer/scripts/spamassassin.py b/modoboa_installer/scripts/spamassassin.py
index 8f44877..941961d 100644
--- a/modoboa_installer/scripts/spamassassin.py
+++ b/modoboa_installer/scripts/spamassassin.py
@@ -1,6 +1,7 @@
 """Spamassassin related functions."""
 
 import os
+import pwd
 
 from .. import package
 from .. import utils
@@ -54,8 +55,10 @@ class Spamassassin(base.Installer):
 
     def post_run(self):
         """Additional tasks."""
+        amavis_user = self.config.get("amavis", "user")
+        pw = pwd.getpwnam(amavis_user)
         utils.exec_cmd(
-            "pyzor discover", sudo_user=self.config.get("amavis", "user"),
-            login=False
+            "pyzor --homedir {} discover".format(pw[5]),
+            sudo_user=amavis_user, login=False
         )
         install("razor", self.config)