Your deed of trust may have hypothecation language built into it. You may wish to review it.
I agree with MJ. If your mortgage says "Securing Promissory Note dated of even date herewith, in the original principal sum of $10,000 to ABC Company" that should be the acknowledgement that the Mortgagor agrees to pledge this real estate to that loan.
As usual, you should check with your legal counsel for state requirements and required wording.