diff --git a/src/PSADTree/Commands/GetADTreePrincipalGroupMembershipCommand.cs b/src/PSADTree/Commands/GetADTreePrincipalGroupMembershipCommand.cs
index ce51a42..f84029c 100644
--- a/src/PSADTree/Commands/GetADTreePrincipalGroupMembershipCommand.cs
+++ b/src/PSADTree/Commands/GetADTreePrincipalGroupMembershipCommand.cs
@@ -162,7 +162,7 @@ private void EnumerateMembership(
         string source,
         int depth)
     {
-        foreach (Principal group in searchResult)
+        foreach (Principal group in searchResult.GetSortedEnumerable(_comparer))
         {
             if (ShouldExclude(group, _exclusionPatterns))
             {