diff --git a/components/bt/bluedroid/osi/include/osi/thread.h b/components/bt/bluedroid/osi/include/osi/thread.h
index 044aacb6a5..a8e0773b90 100644
--- a/components/bt/bluedroid/osi/include/osi/thread.h
+++ b/components/bt/bluedroid/osi/include/osi/thread.h
@@ -66,7 +66,7 @@ typedef enum {
 #define HCI_HOST_QUEUE_LEN              40
 
 #define HCI_H4_TASK_PINNED_TO_CORE      (TASK_PINNED_TO_CORE)
-#define HCI_H4_TASK_STACK_SIZE          (4096 + BT_TASK_EXTRA_STACK_SIZE)
+#define HCI_H4_TASK_STACK_SIZE          (2048 + BT_TASK_EXTRA_STACK_SIZE)
 #define HCI_H4_TASK_PRIO                (configMAX_PRIORITIES - 4)
 #define HCI_H4_TASK_NAME                "hciH4T"
 #define HCI_H4_QUEUE_LEN                1