1 files changed, 1 insertions, 1 deletions
diff --git a/daemon/gpio_manager.h b/daemon/gpio_manager.h
index c691f26..52bd779 100644
--- a/daemon/gpio_manager.h
+++ b/daemon/gpio_manager.h
@@ -41,7 +41,7 @@ class GpioPin {
  public:
   // TODO(leecam): pins should have a generic device
   // reference, not a sysfs one.
-  GpioPin(GpioPinSysfs* pin) : pin_(pin) {}
+  explicit GpioPin(GpioPinSysfs* pin) : pin_(pin) {}
   ~GpioPin() {
     if (!pin_->mux.empty()) {
       PinMuxManager::GetPinMuxManager()->ReleaseGpio(pin_->mux);