diff --git a/distrib/msw/tmake/filelist.txt b/distrib/msw/tmake/filelist.txt
index 4265aa9311..1f578eaf8b 100644
--- a/distrib/msw/tmake/filelist.txt
+++ b/distrib/msw/tmake/filelist.txt
@@ -602,7 +602,7 @@ utils.cpp	Motif
 window.cpp	Motif
 
 gsockx11.c	X11	Socket
-nanox.c	    X11
+nanox.c	X11
 app.cpp	X11
 bitmap.cpp	X11
 brush.cpp	X11