diff --git a/miosix/arch/cortexM7_stm32f7/stm32f767zi_skyward_death_stack_v4/interfaces-impl/bsp.cpp b/miosix/arch/cortexM7_stm32f7/stm32f767zi_skyward_death_stack_v4/interfaces-impl/bsp.cpp
index eead991bd0b4659e24ce84c4f1e18ead6544a1d3..cde42346fe6ab3e1650bdd2f14f0ae4e6f61d46c 100644
--- a/miosix/arch/cortexM7_stm32f7/stm32f767zi_skyward_death_stack_v4/interfaces-impl/bsp.cpp
+++ b/miosix/arch/cortexM7_stm32f7/stm32f767zi_skyward_death_stack_v4/interfaces-impl/bsp.cpp
@@ -348,6 +348,9 @@ void IRQbspInit()
     liftoff_detach::mode(Mode::INPUT);
     nosecone_detach::mode(Mode::INPUT);
 
+    using namespace actuators;
+    buzzer::mode(Mode::ALTERNATE_OD_PULL_DOWN);
+
     DefaultConsole::instance().IRQset(intrusive_ref_ptr<Device>(new STM32Serial(
         defaultSerial, defaultSerialSpeed, STM32Serial::NOFLOWCTRL)));
 }