diff --git a/src/widgets/slider.cpp b/src/widgets/slider.cpp
index 023101e73b..59d0483668 100644
--- a/src/widgets/slider.cpp
+++ b/src/widgets/slider.cpp
@@ -63,8 +63,9 @@ void DrawSliderWidget(Rect r, int min_value, int max_value, int value, const std
 	}
 
 	/* Draw a slider handle indicating current value. */
+	value -= min_value;
 	if (_current_text_dir == TD_RTL) value = max_value - value;
-	x = r.left + ((value - min_value) * (r.right - r.left - sw) / max_value);
+	x = r.left + (value * (r.right - r.left - sw) / max_value);
 	DrawFrameRect(x, r.top, x + sw, r.bottom, COLOUR_GREY, FR_NONE);
 }