diff --git a/include/uv.h b/include/uv.h
index ea52a7b6..896d907c 100644
--- a/include/uv.h
+++ b/include/uv.h
@@ -976,7 +976,7 @@ UV_EXTERN int uv_udp_bind(uv_udp_t* handle,
                           const struct sockaddr* addr,
                           unsigned int flags);
 
-UV_EXTERN int uv_udp_getsockname(uv_udp_t* handle,
+UV_EXTERN int uv_udp_getsockname(const uv_udp_t* handle,
                                  struct sockaddr* name,
                                  int* namelen);
 
diff --git a/src/unix/udp.c b/src/unix/udp.c
index ef5bf981..bf91cbdf 100644
--- a/src/unix/udp.c
+++ b/src/unix/udp.c
@@ -703,7 +703,9 @@ int uv_udp_set_multicast_interface(uv_udp_t* handle, const char* interface_addr)
 }
 
 
-int uv_udp_getsockname(uv_udp_t* handle, struct sockaddr* name, int* namelen) {
+int uv_udp_getsockname(const uv_udp_t* handle,
+                       struct sockaddr* name,
+                       int* namelen) {
   socklen_t socklen;
 
   if (handle->io_watcher.fd == -1)
diff --git a/src/win/udp.c b/src/win/udp.c
index b287c634..ef63dd73 100644
--- a/src/win/udp.c
+++ b/src/win/udp.c
@@ -37,8 +37,9 @@ const unsigned int uv_active_udp_streams_threshold = 0;
 /* A zero-size buffer for use by uv_udp_read */
 static char uv_zero_[] = "";
 
-int uv_udp_getsockname(uv_udp_t* handle, struct sockaddr* name,
-    int* namelen) {
+int uv_udp_getsockname(const uv_udp_t* handle,
+                       struct sockaddr* name,
+                       int* namelen) {
   int result;
 
   if (!(handle->flags & UV_HANDLE_BOUND)) {