diff --git a/src/viewport.cpp b/src/viewport.cpp
index 62628d59a9..d9b1d8f4a0 100644
--- a/src/viewport.cpp
+++ b/src/viewport.cpp
@@ -4540,7 +4540,7 @@ calc_heightdiff_single_direction:;
 			}
 
 			params[index++] = DistanceFromEdge(t1);
-			params[index++] = GetTileMaxZ(t1) / TILE_HEIGHT * TILE_HEIGHT_STEP;
+			params[index++] = GetTileMaxZ(t1) * TILE_HEIGHT_STEP;
 			params[index++] = heightdiff;
 			//Show always the measurement tooltip
 			GuiShowTooltips(_thd.GetCallbackWnd(),STR_MEASURE_DIST_HEIGHTDIFF, index, params, TCC_LEFT_CLICK);