--- a/src/train_cmd.cpp	Wed May 14 15:34:04 2008 +0000
+++ b/src/train_cmd.cpp	Wed May 14 16:38:53 2008 +0000
@@ -2262,7 +2262,7 @@
 
 		v->load_unload_time_rem = 0;
 
-		if (UpdateSignalsOnSegment(v->tile, INVALID_DIAGDIR, v->owner)) {
+		if (UpdateSignalsOnSegment(v->tile, INVALID_DIAGDIR, v->owner) == SIGSEG_FULL) {
 			InvalidateWindowClasses(WC_TRAINS_LIST);
 			return true;
 		}