diff --git a/src/Umbraco.Core/Services/IMemberService.cs b/src/Umbraco.Core/Services/IMemberService.cs
index 05bcafba38..87c15573c6 100644
--- a/src/Umbraco.Core/Services/IMemberService.cs
+++ b/src/Umbraco.Core/Services/IMemberService.cs
@@ -8,7 +8,7 @@ namespace Umbraco.Core.Services
     /// <summary>
     /// Defines the MemberService, which is an easy access to operations involving (umbraco) members.
     /// </summary>
-    public interface IMemberService : IMembershipMemberService
+    internal interface IMemberService : IMembershipMemberService
     {
         /// <summary>
         /// Checks if a member with the id exists
diff --git a/src/Umbraco.Core/Services/IMembershipMemberService.cs b/src/Umbraco.Core/Services/IMembershipMemberService.cs
index 01fa2954f0..026615ef11 100644
--- a/src/Umbraco.Core/Services/IMembershipMemberService.cs
+++ b/src/Umbraco.Core/Services/IMembershipMemberService.cs
@@ -13,7 +13,7 @@ namespace Umbraco.Core.Services
     /// <remarks>
     /// Idea is to have this is an isolated interface so that it can be easily 'replaced' in the membership provider impl.
     /// </remarks>
-    public interface IMembershipMemberService : IMembershipMemberService<IMember>
+    internal interface IMembershipMemberService : IMembershipMemberService<IMember>
     {
         IMember CreateMember(string email, string username, string password, IMemberType memberType);
     }
@@ -24,7 +24,7 @@ namespace Umbraco.Core.Services
     /// <remarks>
     /// Idea is to have this is an isolated interface so that it can be easily 'replaced' in the membership provider impl.
     /// </remarks>
-    public interface IMembershipMemberService<T> : IService
+    internal interface IMembershipMemberService<T> : IService
         where T : class, IMembershipUser
     {
         /// <summary>