Mutations of the KCNQ2 and KCNQ3 voltage‐gated potassium channel genes have been implicated in the pathophysiology of a spectrum of seizure disorders, ranging from pharmacoresponsive self‐limiting neonatal epilepsy to severe epileptic encephalopathy.1, 2, 3, 4, 5, 6, 7. Here, KCNQ2 is linked to Epileptic encephalopathy.