diff --git a/table/autorail.h b/table/autorail.h
--- a/table/autorail.h
+++ b/table/autorail.h
@@ -1,12 +1,12 @@
 /* $Id$ */
 
 /* Rail selection types (directions):
- / \    / \    / \    / \   / \   / \
-/  /\  /\  \  /===\  /   \ /|  \ /  |\
-\/  /  \  \/  \   /  \===/ \|  / \  |/
- \ /    \ /    \ /    \ /   \ /   \ /
-  0      1      2      3     4     5
-*/
+ *  / \    / \    / \    / \   / \   / \
+ * /  /\  /\  \  /===\  /   \ /|  \ /  |\
+ * \/  /  \  \/  \   /  \===/ \|  / \  |/
+ *  \ /    \ /    \ /    \ /   \ /   \ /
+ *   0      1      2      3     4     5
+ */
 
 // mark invalid tiles red
 #define RED(c) c | PALETTE_SEL_TILE_RED