diff --git a/src/jonase/kibit/rules/arithmetic.clj b/src/jonase/kibit/rules/arithmetic.clj
index da64652..496102a 100644
--- a/src/jonase/kibit/rules/arithmetic.clj
+++ b/src/jonase/kibit/rules/arithmetic.clj
@@ -17,5 +17,6 @@
     (< ?x 0) (neg? ?x)
     
     (= ?x ?x)  true
-    (== ?x ?x) true})
+    (== ?x ?x) true
+    (zero? 0)  true})