Both of these are correct, however the former more colloquial. German often drops the schwa (an unstressed 'e') when there's an inflectional ending takes onto the word. Think of "unser". When we tack and ending onto the word, we always say the word, but also mostly write the word as "unsre", "unsrer", "unsren" and "unsrem". Many multi-syllabic verbs do this when with conjugational endings if the vowel of the last syllable of the stem is an 'e' and it's unstressed.