diff --git a/arch/xtensa/src/esp32/esp32_cpuidlestack.c b/arch/xtensa/src/esp32/esp32_cpuidlestack.c
index 40b763a4c7..6385524c25 100644
--- a/arch/xtensa/src/esp32/esp32_cpuidlestack.c
+++ b/arch/xtensa/src/esp32/esp32_cpuidlestack.c
@@ -43,8 +43,7 @@
 /* Address of the CPU0 IDLE thread */
 
 uint32_t g_cpu1_idlestack[CPU1_IDLETHREAD_STACKWORDS]
-  __attribute__((aligned(16) section(".noinit")));
-
+  __attribute__((aligned(16), section(".noinit")));
 
 /****************************************************************************
  * Public Functions