diff --git a/Octokit.Reactive/Clients/IObservableRepoCollaboratorsClient.cs b/Octokit.Reactive/Clients/IObservableRepoCollaboratorsClient.cs
index 8d9b1373..bb49811a 100644
--- a/Octokit.Reactive/Clients/IObservableRepoCollaboratorsClient.cs
+++ b/Octokit.Reactive/Clients/IObservableRepoCollaboratorsClient.cs
@@ -92,7 +92,7 @@ namespace Octokit.Reactive
         /// </remarks>
         /// <param name="owner">The owner of the repository</param>
         /// <param name="name">The name of the repository</param>
-        /// <param name="user">Username of the prospective collaborator</param>
+        /// <param name="user">Username of the new collaborator</param>
         /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
         /// <returns><see cref="Unit"/></returns>
         IObservable<Unit> Add(string owner, string name, string user);
@@ -117,7 +117,7 @@ namespace Octokit.Reactive
         /// </remarks>
         /// <param name="owner">The owner of the repository</param>
         /// <param name="name">The name of the repository</param>
-        /// <param name="user">Username of the prospective collaborator</param>
+        /// <param name="user">Username of the removed collaborator</param>
         /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
         /// <returns><see cref="Unit"/></returns>
         IObservable<Unit> Delete(string owner, string name, string user);
diff --git a/Octokit.Reactive/Clients/ObservableRepoCollaboratorsClient.cs b/Octokit.Reactive/Clients/ObservableRepoCollaboratorsClient.cs
index 1240f2f0..5177dda4 100644
--- a/Octokit.Reactive/Clients/ObservableRepoCollaboratorsClient.cs
+++ b/Octokit.Reactive/Clients/ObservableRepoCollaboratorsClient.cs
@@ -142,7 +142,7 @@ namespace Octokit.Reactive
         /// </remarks>
         /// <param name="owner">The owner of the repository</param>
         /// <param name="name">The name of the repository</param>
-        /// <param name="user">Username of the prospective collaborator</param>
+        /// <param name="user">Username of the new collaborator</param>
         /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
         /// <returns><see cref="Unit"/></returns>
         public IObservable<Unit> Add(string owner, string name, string user)
@@ -179,7 +179,7 @@ namespace Octokit.Reactive
         /// </remarks>
         /// <param name="owner">The owner of the repository</param>
         /// <param name="name">The name of the repository</param>
-        /// <param name="user">Username of the prospective collaborator</param>
+        /// <param name="user">Username of the deleted collaborator</param>
         /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
         /// <returns><see cref="Unit"/></returns>
         public IObservable<Unit> Delete(string owner, string name, string user)
@@ -198,7 +198,7 @@ namespace Octokit.Reactive
         /// See the <a href="http://developer.github.com/v3/repos/collaborators/#remove-collaborator">API documentation</a> for more information.
         /// </remarks>
         /// <param name="repositoryId">The id of the repository</param>
-        /// <param name="user">Username of the removed collaborator</param>
+        /// <param name="user">Username of the deleted collaborator</param>
         /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
         /// <returns><see cref="Unit"/></returns>
         public IObservable<Unit> Delete(int repositoryId, string user)
diff --git a/Octokit/Clients/RepoCollaboratorsClient.cs b/Octokit/Clients/RepoCollaboratorsClient.cs
index 18137e51..099e2e89 100644
--- a/Octokit/Clients/RepoCollaboratorsClient.cs
+++ b/Octokit/Clients/RepoCollaboratorsClient.cs
@@ -189,7 +189,7 @@ namespace Octokit
         /// </remarks>
         /// <param name="owner">The owner of the repository</param>
         /// <param name="name">The name of the repository</param>
-        /// <param name="user">Username of the removed collaborator</param>
+        /// <param name="user">Username of the deleted collaborator</param>
         /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
         /// <returns><see cref="Task"/></returns>
         public Task Delete(string owner, string name, string user)
@@ -208,7 +208,7 @@ namespace Octokit
         /// See the <a href="http://developer.github.com/v3/repos/collaborators/#remove-collaborator">API documentation</a> for more information.
         /// </remarks>
         /// <param name="repositoryId">The id of the repository</param>
-        /// <param name="user">Username of the removed collaborator</param>
+        /// <param name="user">Username of the deleted collaborator</param>
         /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
         /// <returns><see cref="Task"/></returns>
         public Task Delete(int repositoryId, string user)