diff --git a/pisi/installdb.py b/pisi/installdb.py
index 11f63f87..83a3a15d 100644
--- a/pisi/installdb.py
+++ b/pisi/installdb.py
@@ -140,7 +140,7 @@ class InstallDB:
         pkg = str(pkg)
         if self.is_installed(pkg):
             raise InstallDBError(_("Already installed"))
-        if ctx.config.get_option('postpone-postinstall'):
+        if ctx.config.get_option('postpone_postinstall'):
             state = 'ip'
             self.dp[pkg] = True
         else: