diff --git a/control.lua b/control.lua
index 3fe0f89f..98a1e3f6 100644
--- a/control.lua
+++ b/control.lua
@@ -1,7 +1,7 @@
 require 'config'
 require 'utils.utils'
 require 'utils.list_utils'
-require 'utils.math_fix'
+require 'utils.math'
 
 local Game = require 'utils.game'
 
diff --git a/utils/math_fix.lua b/utils/math.lua
similarity index 85%
rename from utils/math_fix.lua
rename to utils/math.lua
index 2ee9630b..a0ed112a 100644
--- a/utils/math_fix.lua
+++ b/utils/math.lua
@@ -5,7 +5,10 @@ math.sin = function(x)
      return math.floor(_sin(x) * 10000000 + 0.5) / 10000000
 end
 
-
 math.cos = function(x)
      return math.floor(_cos(x) * 10000000 + 0.5) / 10000000
 end
+
+math.sqrt2 = math.sqrt(2)
+
+return math