diff --git a/selfdrive/boardd/panda.cc b/selfdrive/boardd/panda.cc
index 1d8880dc3f..4a7af2b718 100644
--- a/selfdrive/boardd/panda.cc
+++ b/selfdrive/boardd/panda.cc
@@ -338,7 +338,7 @@ void Panda::set_power_saving(bool power_saving) {
   usb_write(0xe7, power_saving, 0);
 }
 
-void Panda::enable_deepsleep(void) {
+void Panda::enable_deepsleep() {
   usb_write(0xfb, 0, 0);
 }