diff --git a/setup.py b/setup.py
index e47b2ab90958b9..c3cf2417bc429d 100644
--- a/setup.py
+++ b/setup.py
@@ -1247,7 +1247,7 @@ def detect_readline_curses(self):
             self.missing.append('_curses_panel')
 
     def detect_crypt(self):
-         self.addext(Extension('_crypt', ['_cryptmodule.c']))
+        self.addext(Extension('_crypt', ['_cryptmodule.c']))
 
     def detect_dbm_gdbm(self):
         # Modules that provide persistent dictionary-like semantics.  You will