diff --git a/MissionEditor/MapData.h b/MissionEditor/MapData.h
index c6af5e1..df49702 100644
--- a/MissionEditor/MapData.h
+++ b/MissionEditor/MapData.h
@@ -663,7 +663,8 @@ inline MapCoords CMapData::ToMapCoords(ProjectedCoords xy) const
 
 inline MapCoords CMapData::ToMapCoords3d(ProjectedCoords xy, int mapZ) const
 {
-	float cx = xy.x, cy = xy.y + mapZ * f_y / 2;
+	auto const cx = static_cast<float>(xy.x);
+	auto const cy = static_cast<float>(xy.y + mapZ * f_y / 2);
 	return MapCoords(
 		cy / (float)f_y - cx / (float)f_x + (float)(m_IsoSize - 2) / 2 + (float)0.5,
 		cy / (float)f_y + cx / (float)f_x - (float)(m_IsoSize - 2) / 2.0f - (float)0.5