diff --git a/src/docker.js b/src/docker.js
index 748dc5c9b..cf8bda0b1 100644
--- a/src/docker.js
+++ b/src/docker.js
@@ -448,7 +448,7 @@ function stopContainers(appId, callback) {
     assert.strictEqual(typeof appId, 'string');
     assert.strictEqual(typeof callback, 'function');
 
-    debug('stopping containers of %s', appId);
+    debug('Stopping containers of %s', appId);
 
     gConnection.listContainers({ all: 1, filters: JSON.stringify({ label: [ 'appId=' + appId ] }) }, function (error, containers) {
         if (error) return callback(new BoxError(BoxError.DOCKER_ERROR, error));