1 files changed, 1 insertions, 1 deletions
diff --git a/rail.h b/rail.h
index 794a9fe9a..cf75f6842 100644
--- a/rail.h
+++ b/rail.h
@@ -557,7 +557,7 @@ static inline SignalType GetSignalType(TileIndex tile, Track track)
 static inline bool HasSemaphores(TileIndex tile, Track track)
 {
 	assert(IsValidTrack(track));
-	return _m[tile].m4 & SIG_SEMAPHORE_MASK;
+	return (_m[tile].m4 & SIG_SEMAPHORE_MASK) != 0;
 }
 
 /**