diff --git a/Rubeus/lib/Crypto.cs b/Rubeus/lib/Crypto.cs
index 84c4858c..c607a042 100755
--- a/Rubeus/lib/Crypto.cs
+++ b/Rubeus/lib/Crypto.cs
@@ -71,7 +71,7 @@ public static string KerberosPasswordHash(Interop.KERB_ETYPE etype, string passw
 
             byte[] output = new byte[pCSystem.KeySize];
 
-            int success = pCSystemHashPassword(passwordUnicode, saltUnicode, count, output);
+            int success = pCSystemHashPassword(ref passwordUnicode, ref saltUnicode, count, output);
 
             if (status != 0)
                 throw new Win32Exception(status);
diff --git a/Rubeus/lib/Interop.cs b/Rubeus/lib/Interop.cs
index 4cc95c27..d7e7f1dd 100755
--- a/Rubeus/lib/Interop.cs
+++ b/Rubeus/lib/Interop.cs
@@ -1496,7 +1496,7 @@ public class NetResource
         public delegate int KERB_ECRYPT_Decrypt(IntPtr pContext, byte[] data, int dataSize, byte[] output, ref int outputSize);
         public delegate int KERB_ECRYPT_Finish(ref IntPtr pContext);
 
-        public delegate int KERB_ECRYPT_HashPassword(UNICODE_STRING Password, UNICODE_STRING Salt, int count, byte[] output);
+        public delegate int KERB_ECRYPT_HashPassword(ref UNICODE_STRING Password, ref UNICODE_STRING Salt, int count, byte[] output);
 
         //https://github.com/vletoux/MakeMeEnterpriseAdmin/blob/master/MakeMeEnterpriseAdmin.ps1#L1760-L1767
         public delegate int KERB_CHECKSUM_Initialize(int unk0, out IntPtr pContext);