diff --git a/lib/onewire/one_wire_master.cpp b/lib/onewire/one_wire_master.cpp
index b7b037f1..e96eeaae 100644
--- a/lib/onewire/one_wire_master.cpp
+++ b/lib/onewire/one_wire_master.cpp
@@ -12,10 +12,12 @@ OneWireMaster::~OneWireMaster() {
 
 void OneWireMaster::start(void) {
     gpio_init(gpio, GpioModeOutputOpenDrain);
+    api_hal_power_enable_otg();
 }
 
 void OneWireMaster::stop(void) {
     gpio_init(gpio, GpioModeAnalog);
+    api_hal_power_disable_otg();
 }
 
 void OneWireMaster::reset_search() {