diff --git a/radio/src/targets/sky9x/audio_driver.cpp b/radio/src/targets/sky9x/audio_driver.cpp
index 4cfe0b25b..ce6868e46 100644
--- a/radio/src/targets/sky9x/audio_driver.cpp
+++ b/radio/src/targets/sky9x/audio_driver.cpp
@@ -107,6 +107,7 @@ bool dacQueue(AudioBuffer *buffer)
   return false;
 }
 
+#pragma GCC optimize ("O1")
 extern "C" void DAC_IRQHandler()
 {
   AudioBuffer *nextBuffer = audioQueue.getNextFilledBuffer();
@@ -118,6 +119,7 @@ extern "C" void DAC_IRQHandler()
     dacStop();
   }
 }
+#pragma GCC optimize ("O2")
 
 // Sound routines
 void audioInit()