From Longman Dictionary of Contemporary Englishbe mistakenbe mistakenWRONG/INCORRECTif you are mistaken, you are wrong about something that you thought you knew or saw It can’t have been my car. You must be mistaken. I thought he said 12 o'clock, but I might have been mistaken. We bought the rug in Turkey, if I’m not mistaken.► see thesaurus at wrong → mistaken
Examples from the Corpus
if I’m not mistaken• I think there's mint in this sauce, if I'm not mistaken. 