diff --git a/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/interopt.cs b/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/interopt.cs
index 5ff280398e7884..fe164bc8a926e2 100644
--- a/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/interopt.cs
+++ b/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/interopt.cs
@@ -19,9 +19,10 @@ internal static class UnsafeNativeMethods
     {
         public static int ADsOpenObject(string path, string userName, string password, int flags, [In, Out] ref Guid iid, [Out, MarshalAs(UnmanagedType.Interface)] out object ppObject)
         {
+            IntPtr ppObjPtr = IntPtr.Zero;
             try
             {
-                int hr = Interop.Activeds.ADsOpenObject(path, userName, password, flags, ref iid, out IntPtr ppObjPtr);
+                int hr = Interop.Activeds.ADsOpenObject(path, userName, password, flags, ref iid, out ppObjPtr);
                 ppObject = Marshal.GetObjectForIUnknown(ppObjPtr);
                 return hr;
             }
@@ -29,6 +30,13 @@ public static int ADsOpenObject(string path, string userName, string password, i
             {
                 throw new InvalidOperationException(SR.AdsiNotInstalled);
             }
+            finally
+            {
+                if (ppObjPtr != IntPtr.Zero)
+                {
+                    Marshal.Release(ppObjPtr);
+                }
+            }
         }
 
         //