Auditory verbal hallucinations (avh) are known to occur in relative isolation in various psychiatric disorders and as well in autism spectrum disorder (ASD). Up till now, research into the occurrence of auditory verbal hallucinations in patients who have a psychiatric disorder and ASD has been very limited. In order to give some indication about the effects of such a combination in one individual, we present a case-description of a 37-year-old man diagnosed with both pervasive developmental disorder - not otherwise specified (pdd-nos) and a mild intellectual disability. He was treated at the specialised outpatient ‘Voices Clinic’ of the University Hospital in Utrecht umc. The patient responsed well treatment.