diff --git a/doc/zmq_setsockopt.txt b/doc/zmq_setsockopt.txt
index 92306596..3d73c899 100644
--- a/doc/zmq_setsockopt.txt
+++ b/doc/zmq_setsockopt.txt
@@ -180,6 +180,7 @@ Option value unit:: milliseconds
 Default value:: 10000
 Applicable socket types:: all, when using multicast transports
 
+
 ZMQ_SNDBUF: Set kernel transmit buffer size
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 The 'ZMQ_SNDBUF' option shall set the underlying kernel transmit buffer size
diff --git a/src/lb.cpp b/src/lb.cpp
index f02c4ad1..933e4447 100644
--- a/src/lb.cpp
+++ b/src/lb.cpp
@@ -102,8 +102,8 @@ int zmq::lb_t::send (msg_t *msg_)
         return -1;
     }
 
-    //  If it's final part of the message we can fluch it downstream and
-    //  continue round-robinning (load balance).
+    //  If it's final part of the message we can flush it downstream and
+    //  continue round-robining (load balance).
     more = msg_->flags () & msg_t::more? true: false;
     if (!more) {
         pipes [current]->flush ();
diff --git a/src/options.cpp b/src/options.cpp
index 9f911567..5f76d426 100644
--- a/src/options.cpp
+++ b/src/options.cpp
@@ -286,6 +286,10 @@ int zmq::options_t::setsockopt (int option_, const void *optval_,
             break;
             
         case ZMQ_CURVE_SERVER:
+#           ifndef HAVE_LIBSODIUM
+            puts ("E: libzmq was not built using libsodium, CURVE not available");
+            assert (false);
+#           endif
             if (is_int && (value == 0 || value == 1)) {
                 as_server = value;
                 mechanism = value? ZMQ_CURVE: ZMQ_NULL;
@@ -294,6 +298,10 @@ int zmq::options_t::setsockopt (int option_, const void *optval_,
             break;
             
         case ZMQ_CURVE_PUBLICKEY:
+#           ifndef HAVE_LIBSODIUM
+            puts ("E: libzmq was not built using libsodium, CURVE not available");
+            assert (false);
+#           endif
             if (optvallen_ == CURVE_KEYSIZE) {
                 memcpy (curve_public_key, optval_, CURVE_KEYSIZE);
                 mechanism = ZMQ_CURVE;
@@ -302,6 +310,10 @@ int zmq::options_t::setsockopt (int option_, const void *optval_,
             break;
             
         case ZMQ_CURVE_SECRETKEY:
+#           ifndef HAVE_LIBSODIUM
+            puts ("E: libzmq was not built using libsodium, CURVE not available");
+            assert (false);
+#           endif
             if (optvallen_ == CURVE_KEYSIZE) {
                 memcpy (curve_secret_key, optval_, CURVE_KEYSIZE);
                 mechanism = ZMQ_CURVE;
@@ -310,6 +322,10 @@ int zmq::options_t::setsockopt (int option_, const void *optval_,
             break;
             
         case ZMQ_CURVE_SERVERKEY:
+#           ifndef HAVE_LIBSODIUM
+            puts ("E: libzmq was not built using libsodium, CURVE not available");
+            assert (false);
+#           endif
             if (optvallen_ == CURVE_KEYSIZE) {
                 memcpy (curve_server_key, optval_, CURVE_KEYSIZE);
                 as_server = 0;
diff --git a/tests/test_monitor.cpp b/tests/test_monitor.cpp
index 86e82c5f..d14ceb16 100644
--- a/tests/test_monitor.cpp
+++ b/tests/test_monitor.cpp
@@ -21,6 +21,7 @@
 #include "../include/zmq.h"
 #include <pthread.h>
 #include <string.h>
+#include <unistd.h>
 #include "testutil.hpp"
 
 // REQ socket events handled
@@ -215,7 +216,7 @@ int main (void)
     assert (rc == 0);
     rc = pthread_create (&threads [1], NULL, req_socket_monitor, ctx);
     assert (rc == 0);
-    sleep(1);
+    sleep (1);
 
     // Bind REQ and REP
     rc = zmq_bind (rep, addr.c_str());