diff --git a/res/modules/animation.lua b/res/modules/animation.lua
index e1d21acbd..d7da501f9 100644
--- a/res/modules/animation.lua
+++ b/res/modules/animation.lua
@@ -92,6 +92,7 @@ end
 
 local env = {
     mat4 = mat4,
+    e = math.exp(1),
     X = {1, 0, 0},
     Y = {0, 1, 0},
     Z = {0, 0, 1},