diff --git a/Octokit.Reactive/Clients/IObservableRepositoryContentsClient.cs b/Octokit.Reactive/Clients/IObservableRepositoryContentsClient.cs
index 520bf118..45d07226 100644
--- a/Octokit.Reactive/Clients/IObservableRepositoryContentsClient.cs
+++ b/Octokit.Reactive/Clients/IObservableRepositoryContentsClient.cs
@@ -141,12 +141,12 @@ namespace Octokit.Reactive
         /// </remarks>
         /// <param name="owner">The owner of the repository</param>
         /// <param name="name">The name of the repository</param>
-        /// <param name="path">The content path</param>
         /// <param name="reference">The name of the commit/branch/tag. Default: the repository’s default branch (usually master)</param>
+        /// <param name="path">The content path</param>
         /// <returns>
         /// A collection of <see cref="RepositoryContent"/> representing the content at the specified path
         /// </returns>
-        IObservable<RepositoryContent> GetAllContentsByRef(string owner, string name, string path, string reference);
+        IObservable<RepositoryContent> GetAllContentsByRef(string owner, string name, string reference, string path);
 
 
         /// <summary>
diff --git a/Octokit.Reactive/Clients/ObservableRepositoryContentsClient.cs b/Octokit.Reactive/Clients/ObservableRepositoryContentsClient.cs
index 7f818ca0..f45de373 100644
--- a/Octokit.Reactive/Clients/ObservableRepositoryContentsClient.cs
+++ b/Octokit.Reactive/Clients/ObservableRepositoryContentsClient.cs
@@ -211,17 +211,17 @@ namespace Octokit.Reactive
         /// </remarks>
         /// <param name="owner">The owner of the repository</param>
         /// <param name="name">The name of the repository</param>
-        /// <param name="path">The content path</param>
         /// <param name="reference">The name of the commit/branch/tag. Default: the repository’s default branch (usually master)</param>
+        /// <param name="path">The content path</param>
         /// <returns>
         /// A collection of <see cref="RepositoryContent"/> representing the content at the specified path
         /// </returns>
-        public IObservable<RepositoryContent> GetAllContentsByRef(string owner, string name, string path, string reference)
+        public IObservable<RepositoryContent> GetAllContentsByRef(string owner, string name, string reference, string path)
         {
             Ensure.ArgumentNotNullOrEmptyString(owner, "owner");
             Ensure.ArgumentNotNullOrEmptyString(name, "name");
-            Ensure.ArgumentNotNullOrEmptyString(path, "path");
             Ensure.ArgumentNotNullOrEmptyString(reference, "reference");
+            Ensure.ArgumentNotNullOrEmptyString(path, "path");
 
             return _client.Connection.GetAndFlattenAllPages<RepositoryContent>(ApiUrls.RepositoryContent(owner, name, path, reference));
         }