diff --git a/portable/ThirdParty/GCC/Xtensa_ESP32/include/portmacro.h b/portable/ThirdParty/GCC/Xtensa_ESP32/include/portmacro.h
index 9ca090aa4..eba402d59 100644
--- a/portable/ThirdParty/GCC/Xtensa_ESP32/include/portmacro.h
+++ b/portable/ThirdParty/GCC/Xtensa_ESP32/include/portmacro.h
@@ -430,7 +430,7 @@
         #define PRIVILEGED_DATA
     #endif
 
-    bool vApplicationSleep( TickType_t xExpectedIdleTime );
+    void vApplicationSleep( TickType_t xExpectedIdleTime );
     void vPortSetStackWatchpoint( void* pxStackStart );
 
     #define portSUPPRESS_TICKS_AND_SLEEP( idleTime )    vApplicationSleep( idleTime )