diff --git a/src/openvpn/forward.c b/src/openvpn/forward.c
index 40b7cc4..84c23b3 100644
--- a/src/openvpn/forward.c
+++ b/src/openvpn/forward.c
@@ -1790,7 +1790,7 @@
                 socks_preprocess_outgoing_link(c, &to_addr, &size_delta);
 
                 /* Send packet */
-                size = link_socket_write(c->c2.link_socket, &c->c2.to_link, to_addr);
+                size = (int)link_socket_write(c->c2.link_socket, &c->c2.to_link, to_addr);
 
                 /* Undo effect of prepend */
                 link_socket_write_post_size_adjust(&size, size_delta, &c->c2.to_link);
diff --git a/src/openvpn/socket.c b/src/openvpn/socket.c
index 17c5e76..6c790a0 100644
--- a/src/openvpn/socket.c
+++ b/src/openvpn/socket.c
@@ -3399,7 +3399,7 @@
  * Socket Write Routines
  */
 
-int
+ssize_t
 link_socket_write_tcp(struct link_socket *sock,
                       struct buffer *buf,
                       struct link_socket_actual *to)
@@ -3418,7 +3418,7 @@
 
 #if ENABLE_IP_PKTINFO
 
-size_t
+ssize_t
 link_socket_write_udp_posix_sendmsg(struct link_socket *sock,
                                     struct buffer *buf,
                                     struct link_socket_actual *to)
diff --git a/src/openvpn/socket.h b/src/openvpn/socket.h
index 47083ad..bbdabfb 100644
--- a/src/openvpn/socket.h
+++ b/src/openvpn/socket.h
@@ -1099,9 +1099,9 @@
  * Socket Write routines
  */
 
-int link_socket_write_tcp(struct link_socket *sock,
-                          struct buffer *buf,
-                          struct link_socket_actual *to);
+ssize_t link_socket_write_tcp(struct link_socket *sock,
+                              struct buffer *buf,
+                              struct link_socket_actual *to);
 
 #ifdef _WIN32
 
@@ -1135,12 +1135,12 @@
 
 #else  /* ifdef _WIN32 */
 
-size_t link_socket_write_udp_posix_sendmsg(struct link_socket *sock,
-                                           struct buffer *buf,
-                                           struct link_socket_actual *to);
+ssize_t link_socket_write_udp_posix_sendmsg(struct link_socket *sock,
+                                            struct buffer *buf,
+                                            struct link_socket_actual *to);
 
 
-static inline size_t
+static inline ssize_t
 link_socket_write_udp_posix(struct link_socket *sock,
                             struct buffer *buf,
                             struct link_socket_actual *to)
@@ -1158,7 +1158,7 @@
                   (socklen_t) af_addr_size(to->dest.addr.sa.sa_family));
 }
 
-static inline size_t
+static inline ssize_t
 link_socket_write_tcp_posix(struct link_socket *sock,
                             struct buffer *buf,
                             struct link_socket_actual *to)
@@ -1168,7 +1168,7 @@
 
 #endif /* ifdef _WIN32 */
 
-static inline size_t
+static inline ssize_t
 link_socket_write_udp(struct link_socket *sock,
                       struct buffer *buf,
                       struct link_socket_actual *to)
@@ -1181,7 +1181,7 @@
 }
 
 /* write a TCP or UDP packet to link */
-static inline int
+static inline ssize_t
 link_socket_write(struct link_socket *sock,
                   struct buffer *buf,
                   struct link_socket_actual *to)