This study sought to identify a heretofore unrecognized cognitive inhibition abnormality in Borderline Personality Disorder (BPD) – impaired Retrieval-Induced Forgetting (RIF). Specifically this study examined if individuals with BPD would demonstrate that the retrieval process fails to impair inhibition of unpracticed BPD-related words when recalling related BPD-category words. A modified version of Anderson's (1994) RIF paradigm was used in which half of the words were BPD-related and half of the words were neutral. Twenty-four individuals diagnosed with BPD and 26 individuals without a diagnosis of BPD participated in this study. Within group analyses revealed that individuals diagnosed with BPD demonstrated significantly impaired RIF for BPDcategory words compared to neutral words. Between group analyses revealed that individuals diagnosed with BPD also demonstrated impaired RIF in comparison to individuals without a diagnosis with BPD. Both groups demonstrated RIF for neutral words. This impaired RIF effect can be likened to an impaired inhibition of memory leaving the memory systems of individuals with BPD overloaded. These findings demonstrate how RIF is impaired with the presence of BPD and may serve as a newly appreciated mechanism of dysinhibition in BPD.