1 files changed, 2 insertions, 0 deletions
diff --git a/src/train.h b/src/train.h
index 9ce4764f3..6922ee2ca 100644
--- a/src/train.h
+++ b/src/train.h
@@ -139,6 +139,8 @@ struct Train : public SpecializedVehicle<Train, VEH_TRAIN> {
 	void CargoChanged();
 	void PowerChanged();
 
+	int UpdateSpeed();
+
 	void UpdateAcceleration();
 
 	/**