The present study examined the role of acculturation in manifestation of depressive symptoms among 230 Korean-American older adults (M age = 69.8, SD = 7.05) in Florida. Given the cultural emphasis on modesty and self-effacement in the traditional Korean society, we hypothesized that older Korean-Americans who were less acculturated to American culture, when compared to the more acculturated ones, would be more likely to inhibit positive affects in depressive symptom reports. Using two validated measures of depressive symptoms, the short forms of the Geriatric Depression Scale (GDS-SF) and the Center for Epidemiologic Studies-Depression Scale (CES-D), different response patterns for low and high acculturation groups were identified. First, there was low comparability in the factor structures for both the GDS-SF and the CES-D across low and high acculturation groups. A differential item function (DIF) analysis based on partial correlations indicated that older adults in the low acculturation group inhibited endorsing positive affect items; one item in the GDS-SF (#7 'feel happy') and two items in the CES-D (# 5 'felt hopeful' and # 8 'was happy'). The finding suggests the substantial cultural influences in expressing emotions, especially those related to positive affects. Implications are discussed from a cultural perspective.