diff --git a/resources/process-openmaptiles.lua b/resources/process-openmaptiles.lua
index 342c2951..45e53be6 100644
--- a/resources/process-openmaptiles.lua
+++ b/resources/process-openmaptiles.lua
@@ -868,10 +868,10 @@ function GetPOIRank()
 end
 
 function SetBuildingHeightAttributes()
-	local height = tonumber(Find("height"), 10)
-	local minHeight = tonumber(Find("min_height"), 10)
-	local levels = tonumber(Find("building:levels"), 10)
-	local minLevel = tonumber(Find("building:min_level"), 10)
+	local height = tonumber(Find("height"))
+	local minHeight = tonumber(Find("min_height"))
+	local levels = tonumber(Find("building:levels"))
+	local minLevel = tonumber(Find("building:min_level"))
 
 	local renderHeight = BUILDING_FLOOR_HEIGHT
 	if height or levels then