diff --git a/setup.cfg b/setup.cfg
index 308c351..89d2b72 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [install]
-install-purelib=/usr/share/fail2ban-p2p
+install_purelib=/usr/share/fail2ban-p2p
 
 [sdist]
 formats=bztar