diff --git a/doc/site/modules/core/num.markdown b/doc/site/modules/core/num.markdown
index 095f6ded..a39734bc 100644
--- a/doc/site/modules/core/num.markdown
+++ b/doc/site/modules/core/num.markdown
@@ -62,6 +62,10 @@ The arc tangent of the number.
 The arc tangent of the number when divided by `x`, using the signs of the two
 numbers to determine the quadrant of the result.
 
+### **cbrt**
+
+The cube root of the number.
+
 ### **ceil**
 
 Rounds the number up to the nearest integer.