diff --git a/libtransmission/net.h b/libtransmission/net.h
index 0509f9fad..dca6b774a 100644
--- a/libtransmission/net.h
+++ b/libtransmission/net.h
@@ -152,11 +152,11 @@ tr_socket_t tr_netAccept (tr_session  * session,
                           tr_address  * setme_addr,
                           tr_port     * setme_port);
 
-int  tr_netSetTOS (tr_socket_t s,
+void tr_netSetTOS (tr_socket_t s,
                    int         tos);
 
-int tr_netSetCongestionControl (tr_socket_t   s,
-                                const char  * algorithm);
+void tr_netSetCongestionControl (tr_socket_t   s,
+                                 const char  * algorithm);
 
 void tr_netClose (tr_session  * session,
                   tr_socket_t   s);
diff --git a/libtransmission/verify.c b/libtransmission/verify.c
index cad8ff83b..b034a9d04 100644
--- a/libtransmission/verify.c
+++ b/libtransmission/verify.c
@@ -93,7 +93,7 @@ verifyTorrent (tr_torrent * tor, bool * stopFlag)
               bytesThisPass = numRead;
               tr_sha1_update (sha, buffer, bytesThisPass);
 #if defined HAVE_POSIX_FADVISE && defined POSIX_FADV_DONTNEED
-              posix_fadvise (fd, filePos, bytesThisPass, POSIX_FADV_DONTNEED);
+              (void) posix_fadvise (fd, filePos, bytesThisPass, POSIX_FADV_DONTNEED);
 #endif
             }
         }