diff --git a/metrics-clojure-core/src/metrics/timers.clj b/metrics-clojure-core/src/metrics/timers.clj
index 935d854..78c88e4 100644
--- a/metrics-clojure-core/src/metrics/timers.clj
+++ b/metrics-clojure-core/src/metrics/timers.clj
@@ -120,7 +120,8 @@
   [^Timer t ^clojure.lang.IFn f]
   (.time t ^Callable f))
 
-(defn update! [^Timer t ^long duration, ^TimeUnit unit]
+(defn update!
+  [^Timer t ^long duration, ^TimeUnit unit]
   (.update t duration unit))
 
 (defn start