diff --git a/src/rail_gui.cpp b/src/rail_gui.cpp
index c928974b69..20679dfb44 100644
--- a/src/rail_gui.cpp
+++ b/src/rail_gui.cpp
@@ -1678,7 +1678,7 @@ private:
 		Point offset;
 		Dimension sprite_size = GetSpriteSize(image, &offset);
 		Rect ir = r.Shrink(WidgetDimensions::scaled.imgbtn);
-		int x = CenterBounds(ir.left, ir.right, sprite_size.width - offset.x); // centered
+		int x = CenterBounds(ir.left, ir.right, sprite_size.width - offset.x) - offset.x; // centered
 		int y = ir.top - sig_sprite_bottom_offset +
 				(ir.Height() + sig_sprite_size.height) / 2; // aligned to bottom