--- a/train_cmd.c	Wed Mar 09 19:48:20 2005 +0000
+++ b/train_cmd.c	Wed Mar 09 21:54:52 2005 +0000
@@ -281,7 +281,7 @@
 	v->acceleration = clamp(power / weight * 4, 1, 255);
 }
 
-int GetTrainImage(Vehicle *v, byte direction)
+int GetTrainImage(const Vehicle *v, byte direction)
 {
 	int img = v->spritenum;
 	int base;