diff --git a/plugins/Utilities.py b/plugins/Utilities.py
index 781c308b5..f35246b89 100644
--- a/plugins/Utilities.py
+++ b/plugins/Utilities.py
@@ -130,6 +130,7 @@ class Utilities(callbacks.Privmsg):
         total = 0
         for arg in args:
             total += len(arg)
+        total += len(args)-1 # spaces between the arguments.
         irc.reply(msg, str(total))
 
     def repr(self, irc, msg, args):
diff --git a/test/test_Utilities.py b/test/test_Utilities.py
index 88dd1f2a6..c7562a45b 100644
--- a/test/test_Utilities.py
+++ b/test/test_Utilities.py
@@ -55,6 +55,7 @@ class UtilitiesTestCase(PluginTestCase):
 
     def testStrlen(self):
         self.assertResponse('strlen %s' % ('s'*10), '10')
+        self.assertResponse('strlen a b', '3')
 
     def testRepr(self):
         self.assertResponse('repr foo bar baz', '"foo bar baz"')