diff --git a/res/modules/internal/animation_codegen.lua b/res/modules/internal/animation_codegen.lua
index 7eadfb4e6..66db0bed4 100644
--- a/res/modules/internal/animation_codegen.lua
+++ b/res/modules/internal/animation_codegen.lua
@@ -121,7 +121,7 @@ local env = {
 
 local math_funcs = {
     "sqrt", "min", "max", "deg", "rad", "log", "log10", "floor", "ceil", "sin",
-    "tan", "noise", "noise2", "sign", "round", "exp", "pi", "e"
+    "cos", "tan", "noise", "noise2", "sign", "round", "exp", "pi", "e"
 }
 for _, name in ipairs(math_funcs) do
     env[name] = math[name]