What happens when you inadvertently omit information on your n-400?

Asked in Silver Spring, MD - 7 months

I was arrested twice in my country during political activities. I stated this on my asylum and I485 forms. They granted both based on that. When filling my form N400 I focused on my US arrest and inadvertently didn't include the political arrests. The N400 interviewer asked me if I had been arrested before I came to the US. I said yes. He asked how many times. I answered correctly. It still didn’t realize I had omitted that info on my N400 and he didn’t ask me why. He told me I would hear from them within 30 days after my file is reviewed. Going home it dawned on me that was the reason he asked about my previous arrests. A USCIS rep told me to send a letter with the omitted info. I worry about the outcome of this. I wonder if it will count heavily against me. What could possibly happen?