diff --git a/lib/bunyan.js b/lib/bunyan.js
index 9e93d76..ea4d02f 100644
--- a/lib/bunyan.js
+++ b/lib/bunyan.js
@@ -242,7 +242,7 @@ function Logger(options, _childOptions, _childSimple) {
     if (_childOptions !== undefined) {
         parent = options;
         options = _childOptions;
-        if (! parent instanceof Logger) {
+        if (!(parent instanceof Logger)) {
             throw new TypeError(
                 'invalid Logger creation: do not pass a second arg');
         }