1 files changed, 1 insertions, 0 deletions
diff --git a/viewport.h b/viewport.h
index ed0d2be3f..9cdcdc3d5 100644
--- a/viewport.h
+++ b/viewport.h
@@ -31,6 +31,7 @@ enum {
 bool DoZoomInOutWindow(int how, Window *w);
 void ZoomInOrOutToCursorWindow(bool in, Window * w);
 Point GetTileZoomCenterWindow(bool in, Window * w);
+void HandleZoomMessage(Window *w, const ViewPort *vp, byte widget_zoom_in, byte widget_zoom_out);
 
 void OffsetGroundSprite(int x, int y);