diff --git a/src/io_uring.rs b/src/io_uring.rs
index 83941922c..a16c1dd2b 100644
--- a/src/io_uring.rs
+++ b/src/io_uring.rs
@@ -1156,7 +1156,9 @@ pub struct io_uring_sync_cancel_reg {
     pub fd: i32,
     pub flags: IoringAsyncCancelFlags,
     pub timeout: Timespec,
-    pub pad: [u64; 4],
+    pub opcode: u8,
+    pub pad: [u8; 7],
+    pub pad2: [u64; 3],
 }
 
 /// An io_uring Completion Queue Entry.
@@ -1220,7 +1222,7 @@ pub struct io_sqring_offsets {
     pub dropped: u32,
     pub array: u32,
     pub resv1: u32,
-    pub resv2: u64,
+    pub user_addr: u64,
 }
 
 #[allow(missing_docs)]
@@ -1235,7 +1237,7 @@ pub struct io_cqring_offsets {
     pub cqes: u32,
     pub flags: u32,
     pub resv1: u32,
-    pub resv2: u64,
+    pub user_addr: u64,
 }
 
 #[allow(missing_docs)]
@@ -1348,7 +1350,7 @@ pub struct io_uring_buf_reg {
     pub ring_addr: u64,
     pub ring_entries: u32,
     pub bgid: u16,
-    pub pad: u16,
+    pub flags: u16,
     pub resv: [u64; 3_usize],
 }
 
@@ -1497,7 +1499,7 @@ fn io_uring_layouts() {
         dropped,
         array,
         resv1,
-        resv2
+        user_addr
     );
     check_struct!(
         io_cqring_offsets,
@@ -1509,7 +1511,7 @@ fn io_uring_layouts() {
         cqes,
         flags,
         resv1,
-        resv2
+        user_addr
     );
     check_struct!(io_uring_recvmsg_out, namelen, controllen, payloadlen, flags);
     check_struct!(io_uring_probe, last_op, ops_len, resv, resv2, ops);
@@ -1521,7 +1523,16 @@ fn io_uring_layouts() {
     check_struct!(io_uring_getevents_arg, sigmask, sigmask_sz, pad, ts);
     check_struct!(iovec, iov_base, iov_len);
     check_struct!(open_how, flags, mode, resolve);
-    check_struct!(io_uring_buf_reg, ring_addr, ring_entries, bgid, pad, resv);
+    check_struct!(io_uring_buf_reg, ring_addr, ring_entries, bgid, flags, resv);
     check_struct!(io_uring_buf, addr, len, bid, resv);
-    check_struct!(io_uring_sync_cancel_reg, addr, fd, flags, timeout, pad);
+    check_struct!(
+        io_uring_sync_cancel_reg,
+        addr,
+        fd,
+        flags,
+        timeout,
+        opcode,
+        pad,
+        pad2
+    );
 }