diff --git a/plugins/Math.py b/plugins/Math.py
index 9cc344c68..5ed75968c 100644
--- a/plugins/Math.py
+++ b/plugins/Math.py
@@ -129,6 +129,7 @@ class Math(callbacks.Privmsg):
         else:
             return math.sqrt(x)
     _mathEnv['sqrt'] = _sqrt
+    _mathEnv['abs'] = abs
     _mathRe = re.compile(r'((?:(?<![A-Fa-f\d)])-)?'
                          r'(?:0x[A-Fa-f\d]+|'
                          r'0[0-7]+|'
diff --git a/test/test_Math.py b/test/test_Math.py
index cebc909a5..fa0376767 100644
--- a/test/test_Math.py
+++ b/test/test_Math.py
@@ -175,6 +175,12 @@ class MathTestCase(PluginTestCase, PluginDocumentation):
         self.assertNotError('units mass')
         self.assertNotError('units flux density')
 
+    def testAbs(self):
+        self.assertResponse('calc abs(2)', '2')
+        self.assertResponse('calc abs(-2)', '2')
+        self.assertResponse('calc abs(2.0)', '2')
+        self.assertResponse('calc abs(-2.0)', '2')
+
 
 # vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: