diff --git a/src/differentiate.jl b/src/differentiate.jl
index 94e2138..2a63b4e 100644
--- a/src/differentiate.jl
+++ b/src/differentiate.jl
@@ -114,6 +114,7 @@ end
 
 symbolic_derivative_1arg_list = [
     ( :sqrt,        :(  1 / 2 / sqrt(x)                         ))
+    ( :√,           :(  1 / 2 / √(x)                            ))
     ( :cbrt,        :(  1 / 3 / cbrt(x)^2                       ))
     ( :abs2,        :(  1 * 2 * x                               ))
     ( :inv,         :( -1 * abs2(inv(x))                        ))