diff --git a/src/viewport.cpp b/src/viewport.cpp
index e243967236..99a5d27846 100644
--- a/src/viewport.cpp
+++ b/src/viewport.cpp
@@ -3055,7 +3055,7 @@ 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);