diff --git a/libraries/rtos/rtx/TARGET_CORTEX_A/RTX_Conf_CA.c b/libraries/rtos/rtx/TARGET_CORTEX_A/RTX_Conf_CA.c
index 348ec91da4..adc5fae609 100644
--- a/libraries/rtos/rtx/TARGET_CORTEX_A/RTX_Conf_CA.c
+++ b/libraries/rtos/rtx/TARGET_CORTEX_A/RTX_Conf_CA.c
@@ -75,7 +75,7 @@
 //   <i> Defines the combined stack size for threads with user-provided stack size.
 //   <i> Default: 0
 #ifndef OS_PRIVSTKSIZE
- #define OS_PRIVSTKSIZE 4096
+ #define OS_PRIVSTKSIZE 8192
 #endif
 
 // <q>Check for stack overflow