diff --git a/src/Admin.py b/src/Admin.py
index a36628e11..3614b251e 100755
--- a/src/Admin.py
+++ b/src/Admin.py
@@ -226,13 +226,16 @@ class Admin(privmsgs.CapabilityCheckingPrivmsg):
         Re-enables the command <command> for all non-owner users.
         """
         command = privmsgs.getArgs(args)
-        try:
-            anticapability = ircdb.makeAntiCapability(command)
-        except ValueError:
-            irc.error('%r is not a valid command.' % command)
-            return
-        if anticapability in conf.supybot.defaultCapabilities():
-            conf.supybot.defaultCapabilities().remove(anticapability)
+        command = command.lower()
+        L = []
+        for capability in conf.supybot.defaultCapabilities():
+            if ircdb.isAntiCapability(capability):
+                nonAntiCapability = ircdb.unAntiCapability(capability)
+                if nonAntiCapability.lower() == command:
+                    L.append(capability)
+        if L:
+            for capability in L:
+                conf.supybot.defaultCapabilities().remove(capability)
             irc.replySuccess()
         else:
             irc.error('That command wasn\'t disabled.')
diff --git a/test/test_Admin.py b/test/test_Admin.py
index bdcc50d53..86a0f19d2 100644
--- a/test/test_Admin.py
+++ b/test/test_Admin.py
@@ -75,6 +75,10 @@ class AdminTestCase(PluginTestCase, PluginDocumentation):
     def testEnable(self):
         self.assertError('enable enable')
 
+    def testEnableIsCaseInsensitive(self):
+        self.assertNotError('disable Foo')
+        self.assertNotError('enable foo')
+
     def testJoin(self):
         m = self.getMsg('join #foo')
         self.assertEqual(m.command, 'JOIN')