diff --git a/libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef.dat
index df9c3a6de5..ce3fc3bba6 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef.dat
@@ -90,7 +90,7 @@ define PERIPH_FW TRUE
 MAIN_STACK 0x80
 
 # PROCESS_STACK controls stack for main thread
-PROCESS_STACK 0x500
+PROCESS_STACK 0x600
 define HAL_DISABLE_LOOP_DELAY
 
 # enable CAN support