diff --git a/README.md b/README.md
index eaffeda..b96b091 100644
--- a/README.md
+++ b/README.md
@@ -10,9 +10,7 @@ given file.
 
 __Features__
 
-As a regular user account, you can obtain a list of available features.
-But to enable, disable or query the status of a feature for a given file
-a superuser account is required:
+As a regular user account, you can obtain a list of available features:
 
 ``` ruby
 #!/usr/bin/env ruby
@@ -61,17 +59,14 @@ BSD::Control
 A complete API reference is available at
 [0x1eef.github.io/x/hbsdctl.rb](https://0x1eef.github.io/x/hbsdctl.rb).
 
+## Sources
+
+* [GitHub](https://github.com/0x1eef/hbsdctl.rb)
+* [GitLab](https://gitlab.com/0x1eef/hbsdctl.rb)
+* [git.hardenedbsd.org](https://git.hardenedbsd.org/0x1eef/hbsdctl.rb)
+
 ## Install
 
-**Git**
-
-hbsdctl.rb is distributed as a RubyGem through its git repositories. <br>
-[git.hardenedbsd.org](https://git.hardenedbsd.org/0x1eef/hbsdctl.rb),
-[GitHub](https://github.com/0x1eef/hbsdctl.rb),
-and
-[GitLab](https://gitlab.com/0x1eef/hbsdctl.rb)
-are available as sources.
-
 **Rubygems.org**
 
 hbsdctl.rb can also be installed via rubygems.org.
diff --git a/ext/hbsdctl.rb/feature.c b/ext/hbsdctl.rb/feature.c
index 53f9a93..35a1469 100644
--- a/ext/hbsdctl.rb/feature.c
+++ b/ext/hbsdctl.rb/feature.c
@@ -1,8 +1,6 @@
 #include <libhbsdcontrol.h>
-#include <unistd.h>
 #include <errno.h>
 #include "include/feature.h"
-static VALUE __rb_eError(void);
 static VALUE __set(VALUE, VALUE, VALUE);
 
 /**
@@ -33,13 +31,3 @@ __set(VALUE rb_path, VALUE rb_feature, VALUE rb_state)
     rb_syserr_fail(errno, "hbsdcontrol_set_feature_state");
   }
 }
-
-
-static VALUE
-__rb_eError(void)
-{
-  VALUE rb_mBSD = rb_const_get(rb_cObject, rb_intern("BSD")),
-    rb_mControl = rb_const_get(rb_mBSD, rb_intern("Control")),
-    rb_eError = rb_const_get(rb_mControl, rb_intern("Error"));
-  return (rb_eError);
-}
diff --git a/test/superuser/disable_feature_test.rb b/test/superuser/disable_feature_test.rb
index 7ca374e..11468f0 100644
--- a/test/superuser/disable_feature_test.rb
+++ b/test/superuser/disable_feature_test.rb
@@ -5,7 +5,7 @@ module BSD::Control
     include FileUtils
 
     def test_disable_mprotect_nonexistent_file
-      assert_raises Errno::ENOENT do
+      assert_raises(Errno::ENOENT) do
         BSD::Control.feature(:mprotect).disable!(file)
       end
     end