--- a/src/os/unix/udsocket/socket.rs
+++ b/src/os/unix/udsocket/socket.rs
@@ -293,7 +293,7 @@
         let mut addr_buf_staging = unsafe { zeroed::<sockaddr_un>() };
         // It's a void* so the doublecast is mandatory
         hdr.msg_name = &mut addr_buf_staging as *mut _ as *mut _;
-        hdr.msg_namelen = size_of_val(&addr_buf_staging).try_to::<u32>().unwrap();
+        hdr.msg_namelen = size_of_val(&addr_buf_staging).try_to::<libc::socklen_t>().unwrap();
         fill_out_msghdr_r(&mut hdr, bufs, abuf.as_mut())?;
         let (success, bytes_read) = unsafe {
             let result = libc::recvmsg(self.as_raw_fd(), &mut hdr as *mut _, 0);
--- a/src/os/unix/udsocket/c_wrappers.rs
+++ b/src/os/unix/udsocket/c_wrappers.rs
@@ -51,7 +51,7 @@
             // Double cast because you cannot cast a reference to a pointer of arbitrary type
             // but you can cast any narrow pointer to any other narrow pointer
             addr as *const _ as *const sockaddr,
-            size_of::<sockaddr_un>() as u32,
+            size_of::<sockaddr_un>() as libc::socklen_t,
         ) != -1
     };
     if success {
@@ -70,7 +70,7 @@
         libc::connect(
             fd.0,
             addr as *const _ as *const _,
-            size_of::<sockaddr_un>() as u32,
+            size_of::<sockaddr_un>() as libc::socklen_t,
         ) != -1
     };
     if success {
@@ -101,7 +101,7 @@
                 SOL_SOCKET,
                 SO_PASSCRED,
                 &passcred as *const _ as *const _,
-                size_of_val(&passcred) as u32,
+                size_of_val(&passcred) as libc::socklen_t,
             ) != -1
         };
         if success {