diff --git a/zeroconf/src/bonjour/browser.rs b/zeroconf/src/bonjour/browser.rs
index 45fa1b3..ddead28 100644
--- a/zeroconf/src/bonjour/browser.rs
+++ b/zeroconf/src/bonjour/browser.rs
@@ -115,7 +115,7 @@ impl fmt::Debug for BonjourBrowserContext {
     }
 }
 
-unsafe extern "C" fn browse_callback(
+unsafe extern "system" fn browse_callback(
     _sd_ref: DNSServiceRef,
     _flags: DNSServiceFlags,
     interface_index: u32,
@@ -160,7 +160,7 @@ unsafe fn handle_browse(
     )
 }
 
-unsafe extern "C" fn resolve_callback(
+unsafe extern "system" fn resolve_callback(
     _sd_ref: DNSServiceRef,
     _flags: DNSServiceFlags,
     interface_index: u32,
@@ -224,7 +224,7 @@ unsafe fn handle_resolve(
     )
 }
 
-unsafe extern "C" fn get_address_info_callback(
+unsafe extern "system" fn get_address_info_callback(
     _sd_ref: DNSServiceRef,
     _flags: DNSServiceFlags,
     _interface_index: u32,
diff --git a/zeroconf/src/bonjour/service.rs b/zeroconf/src/bonjour/service.rs
index 7cff935..2e752b4 100644
--- a/zeroconf/src/bonjour/service.rs
+++ b/zeroconf/src/bonjour/service.rs
@@ -158,7 +158,7 @@ impl BonjourServiceContext {
     }
 }
 
-unsafe extern "C" fn register_callback(
+unsafe extern "system" fn register_callback(
     _sd_ref: DNSServiceRef,
     _flags: DNSServiceFlags,
     error: DNSServiceErrorType,
diff --git a/zeroconf/src/bonjour/service_ref.rs b/zeroconf/src/bonjour/service_ref.rs
index 4a39e28..1070b95 100644
--- a/zeroconf/src/bonjour/service_ref.rs
+++ b/zeroconf/src/bonjour/service_ref.rs
@@ -2,7 +2,7 @@
 
 use crate::{bonjour::bonjour_util, Result};
 use bonjour_sys::{
-    DNSServiceBrowse, DNSServiceBrowseReply, DNSServiceFlags, DNSServiceGetAddrInfo,
+    dnssd_sock_t, DNSServiceBrowse, DNSServiceBrowseReply, DNSServiceFlags, DNSServiceGetAddrInfo,
     DNSServiceGetAddrInfoReply, DNSServiceProcessResult, DNSServiceProtocol, DNSServiceRef,
     DNSServiceRefDeallocate, DNSServiceRefSockFD, DNSServiceRegister, DNSServiceRegisterReply,
     DNSServiceResolve, DNSServiceResolveReply,
@@ -177,16 +177,7 @@ impl ManagedDNSServiceRef {
     /// Delegate function for [`DNSServiceRefSockFD`].
     ///
     /// [`DNSServiceRefSockFD`]: https://developer.apple.com/documentation/dnssd/1804698-dnsservicerefsockfd?language=objc
-    #[cfg(target_vendor = "apple")]
-    pub fn sock_fd(&self) -> i32 {
-        unsafe { DNSServiceRefSockFD(self.0) }
-    }
-
-    /// Delegate function for [`DNSServiceRefSockFD`].
-    ///
-    /// [`DNSServiceRefSockFD`]: https://developer.apple.com/documentation/dnssd/1804698-dnsservicerefsockfd?language=objc
-    #[cfg(target_vendor = "pc")]
-    pub fn sock_fd(&self) -> u64 {
+    pub fn sock_fd(&self) -> dnssd_sock_t {
         unsafe { DNSServiceRefSockFD(self.0) }
     }
 }
diff --git a/zeroconf/src/ffi/mod.rs b/zeroconf/src/ffi/mod.rs
index 15ac634..6fe23fa 100644
--- a/zeroconf/src/ffi/mod.rs
+++ b/zeroconf/src/ffi/mod.rs
@@ -104,7 +104,7 @@ pub(crate) mod bonjour {
 #[cfg(target_vendor = "pc")]
 pub(crate) mod bonjour {
     use crate::Result;
-    use bonjour_sys::{fd_set, select, timeval};
+    use bonjour_sys::{dnssd_sock_t, fd_set, select, timeval};
     #[cfg(target_vendor = "apple")]
     use std::mem;
     use std::ptr;
@@ -115,7 +115,7 @@ pub(crate) mod bonjour {
     ///
     /// # Safety
     /// This function is unsafe because it directly interfaces with C-library system calls.
-    pub unsafe fn read_select(sock_fd: u64, timeout: Duration) -> Result<u32> {
+    pub unsafe fn read_select(sock_fd: dnssd_sock_t, timeout: Duration) -> Result<u32> {
         if timeout.as_secs() > i32::MAX as u64 {
             return Err(
                 "Invalid timeout duration, as_secs() value exceeds ::libc::c_long. ".into(),