diff --git a/radio/src/gtests.cpp b/radio/src/gtests.cpp
index 281ecc8e6..0516ff27c 100644
--- a/radio/src/gtests.cpp
+++ b/radio/src/gtests.cpp
@@ -44,7 +44,7 @@ void doMixerCalculations();
 
 #define MODEL_RESET() \
   memset(&g_model, 0, sizeof(g_model)); \
-  extern bool s_mixer_first_run_done; \
+  extern uint8_t s_mixer_first_run_done; \
   s_mixer_first_run_done = false;
 
 #define MIXER_RESET() \