diff --git a/samples/portability/cmsis_rtos_v2/philosophers/src/main.c b/samples/portability/cmsis_rtos_v2/philosophers/src/main.c
index 353d1e030f2..e84a3dd0e14 100644
--- a/samples/portability/cmsis_rtos_v2/philosophers/src/main.c
+++ b/samples/portability/cmsis_rtos_v2/philosophers/src/main.c
@@ -68,7 +68,7 @@ osSemaphoreId_t forks[NUM_PHIL];
 
 #define fork(x) (forks[x])
 
-#define STACK_SIZE 512
+#define STACK_SIZE CONFIG_CMSIS_V2_THREAD_MAX_STACK_SIZE
 static K_THREAD_STACK_ARRAY_DEFINE(stacks, NUM_PHIL, STACK_SIZE);
 static osThreadAttr_t thread_attr[] = {
 	{