diff --git a/radio/src/thirdparty/STM32F4xx_DSP_StdPeriph_Lib_V1.4.0/Libraries/CMSIS/Device/ST/STM32F4xx/Source/Templates/gcc_ride7/startup_stm32f40_41xxx.s b/radio/src/thirdparty/STM32F4xx_DSP_StdPeriph_Lib_V1.4.0/Libraries/CMSIS/Device/ST/STM32F4xx/Source/Templates/gcc_ride7/startup_stm32f40_41xxx.s
index 1463eb9b2..4fb8604f7 100644
--- a/radio/src/thirdparty/STM32F4xx_DSP_StdPeriph_Lib_V1.4.0/Libraries/CMSIS/Device/ST/STM32F4xx/Source/Templates/gcc_ride7/startup_stm32f40_41xxx.s
+++ b/radio/src/thirdparty/STM32F4xx_DSP_StdPeriph_Lib_V1.4.0/Libraries/CMSIS/Device/ST/STM32F4xx/Source/Templates/gcc_ride7/startup_stm32f40_41xxx.s
@@ -99,6 +99,16 @@ LoopFillZerobss:
   cmp  r2, r3
   bcc  FillZerobss
 
+/*Paint Main Stack */
+  ldr  r2, = _main_stack_start
+PaintMainStack:
+  movs r3, #0x55555555
+  str  r3, [r2], #4
+LoopPaintMainStack:
+  ldr  r3, = _estack
+  cmp  r2, r3
+  bcc  PaintMainStack
+
 /* Call the clock system intitialization function.*/
   bl  SystemInit
 /* Call C++ constructors for static objects */