comma
diff --git a/README b/README
index d31fede..cd625c3 100644
--- a/README
+++ b/README
@@ -163,7 +163,7 @@
 
 To build Python, you normally type "make" in the toplevel directory.
 If you have changed the configuration, the Makefile may have to be
-rebuilt.  In this case you may have to run make again to correctly
+rebuilt.  In this case, you may have to run make again to correctly
 build your desired target.  The interpreter executable is built in the
 top level directory.