diff --git a/src/rail.h b/src/rail.h
index e4bc280437..d945dab24b 100644
--- a/src/rail.h
+++ b/src/rail.h
@@ -184,7 +184,7 @@ public:
 	/**
 	 * Bridge offset
 	 */
-	SpriteID bridge_offset;
+	uint8_t bridge_offset;
 
 	/**
 	 * Original railtype number to use when drawing non-newgrf railtypes, or when drawing stations.