diff --git a/lib/mathn.rb b/lib/mathn.rb
index c4f5c9e..75fe7ca 100644
--- a/lib/mathn.rb
+++ b/lib/mathn.rb
@@ -182,22 +182,3 @@ module Math
   module_function :sqrt
   module_function :rsqrt
 end
-
-##
-# When mathn is required, Float is changed to handle Complex numbers.
-
-class Float
-  alias power! **
-
-  ##
-  # Exponentiate by +other+
-
-  def ** (other)
-    if self < 0 && other.round != other
-      Complex(self, 0.0) ** other
-    else
-      power!(other)
-    end
-  end
-
-end