diff --git a/src/docker.js b/src/docker.js
index 4ddc16f79..cae91f8e2 100644
--- a/src/docker.js
+++ b/src/docker.js
@@ -108,9 +108,10 @@ function ping(callback) {
 
     connection.ping(function (error, result) {
         if (error) return callback(new BoxError(BoxError.DOCKER_ERROR, error));
-        if (result !== 'OK') return callback(new BoxError(BoxError.DOCKER_ERROR, 'Unable to ping the docker daemon'));
+        if (Buffer.isBuffer(result) && result.toString('utf8') === 'OK') return callback(null); // sometimes it returns buffer
+        if (result === 'OK') return callback(null);
 
-        callback(null);
+        callback(new BoxError(BoxError.DOCKER_ERROR, 'Unable to ping the docker daemon'));
     });
 }