diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
index ee84132cadad4..ac2d90d669c36 100644
--- a/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@ -126,6 +126,7 @@ enum {
 #define IORING_SETUP_TASKRUN_FLAG	(1U << 9)
 
 #define IORING_SETUP_SQE128		(1U << 10) /* SQEs are 128 byte */
+#define IORING_SETUP_CQE32		(1U << 11) /* CQEs are 32 byte */
 
 enum io_uring_op {
 	IORING_OP_NOP,
@@ -245,6 +246,12 @@ struct io_uring_cqe {
 	__u64	user_data;	/* sqe->data submission passed back */
 	__s32	res;		/* result code for this event */
 	__u32	flags;
+
+	/*
+	 * If the ring is initialized with IORING_SETUP_CQE32, then this field
+	 * contains 16-bytes of padding, doubling the size of the CQE.
+	 */
+	__u64 big_cqe[];
 };
 
 /*