diff --git a/perf/c/local_lat.c b/perf/c/local_lat.c
index c65d4b38..81a2e0c8 100644
--- a/perf/c/local_lat.c
+++ b/perf/c/local_lat.c
@@ -52,19 +52,24 @@ int main (int argc, char *argv [])
     rc = zmq_bind (s, bind_to);
     assert (rc == 0);
 
+    rc = zmq_msg_init (&msg);
+    assert (rc == 0);
+
     for (i = 0; i != roundtrip_count; i++) {
-        rc = zmq_msg_init (&msg);
-        assert (rc == 0);
         rc = zmq_recv (s, &msg, 0);
         assert (rc == 0);
         assert (zmq_msg_size (&msg) == message_size);
         rc = zmq_send (s, &msg, 0);
         assert (rc == 0);
-        rc = zmq_msg_close (&msg);
-        assert (rc == 0);
     }
 
+    rc = zmq_msg_close (&msg);
+    assert (rc == 0);
+
     sleep (1);
 
+    rc = zmq_term (ctx);
+    assert (rc == 0);
+
     return 0;
 }
diff --git a/perf/c/local_thr.c b/perf/c/local_thr.c
index b58fac3a..64c492df 100644
--- a/perf/c/local_thr.c
+++ b/perf/c/local_thr.c
@@ -90,7 +90,10 @@ int main (int argc, char *argv [])
     printf ("message size: %d [B]\n", (int) message_size);
     printf ("message count: %d\n", (int) message_count);
     printf ("mean throughput: %d [msg/s]\n", (int) throughput);
-    printf ("mean throughput: %3f [Mb/s]\n", (double) megabits);
+    printf ("mean throughput: %.3f [Mb/s]\n", (double) megabits);
+
+    rc = zmq_term (ctx);
+    assert (rc == 0);
 
     return 0;
 }
diff --git a/perf/c/remote_lat.c b/perf/c/remote_lat.c
index e99da2ea..32329b88 100644
--- a/perf/c/remote_lat.c
+++ b/perf/c/remote_lat.c
@@ -59,18 +59,20 @@ int main (int argc, char *argv [])
     rc = gettimeofday (&start, NULL);
     assert (rc == 0);
 
+    rc = zmq_msg_init_size (&msg, message_size);
+    assert (rc == 0);
+
     for (i = 0; i != roundtrip_count; i++) {
-        rc = zmq_msg_init_size (&msg, message_size);
-        assert (rc == 0);
         rc = zmq_send (s, &msg, 0);
         assert (rc == 0);
         rc = zmq_recv (s, &msg, 0);
         assert (rc == 0);
         assert (zmq_msg_size (&msg) == message_size);
-        rc = zmq_msg_close (&msg);
-        assert (rc == 0);
     }
 
+    rc = zmq_msg_close (&msg);
+    assert (rc == 0);
+
     rc = gettimeofday (&end, NULL);
     assert (rc == 0);
 
@@ -83,7 +85,10 @@ int main (int argc, char *argv [])
 
     printf ("message size: %d [B]\n", (int) message_size);
     printf ("roundtrip count: %d\n", (int) roundtrip_count);
-    printf ("average latency: %3f [us]\n", (double) latency);
+    printf ("average latency: %.3f [us]\n", (double) latency);
+
+    rc = zmq_term (ctx);
+    assert (rc == 0);
 
     return 0;
 }
diff --git a/perf/c/remote_thr.c b/perf/c/remote_thr.c
index d542b1e9..1010bc97 100644
--- a/perf/c/remote_thr.c
+++ b/perf/c/remote_thr.c
@@ -63,5 +63,8 @@ int main (int argc, char *argv [])
 
     sleep (10);
 
+    rc = zmq_term (ctx);
+    assert (rc == 0);
+
     return 0;
 }
diff --git a/perf/cpp/local_thr.cpp b/perf/cpp/local_thr.cpp
index e328117f..3e961dea 100644
--- a/perf/cpp/local_thr.cpp
+++ b/perf/cpp/local_thr.cpp
@@ -71,7 +71,7 @@ int main (int argc, char *argv [])
     printf ("message size: %d [B]\n", (int) message_size);
     printf ("message count: %d\n", (int) message_count);
     printf ("mean throughput: %d [msg/s]\n", (int) throughput);
-    printf ("mean throughput: %3f [Mb/s]\n", (double) megabits);
+    printf ("mean throughput: %.3f [Mb/s]\n", (double) megabits);
 
     return 0;
 }
diff --git a/perf/cpp/remote_lat.cpp b/perf/cpp/remote_lat.cpp
index 3472fd86..169ed1e5 100644
--- a/perf/cpp/remote_lat.cpp
+++ b/perf/cpp/remote_lat.cpp
@@ -64,7 +64,7 @@ int main (int argc, char *argv [])
 
     printf ("message size: %d [B]\n", (int) message_size);
     printf ("roundtrip count: %d\n", (int) roundtrip_count);
-    printf ("average latency: %3f [us]\n", (double) latency);
+    printf ("average latency: %.3f [us]\n", (double) latency);
 
     return 0;
 }
diff --git a/src/session.cpp b/src/session.cpp
index ef17d6d5..ac2dd127 100644
--- a/src/session.cpp
+++ b/src/session.cpp
@@ -36,11 +36,8 @@ zmq::session_t::session_t (object_t *parent_, socket_base_t *owner_,
 
 zmq::session_t::~session_t ()
 {
-    //  Ask associated pipes to terminate.
-    if (in_pipe)
-        in_pipe->term ();
-    if (out_pipe)
-        out_pipe->term ();
+    zmq_assert (!in_pipe);
+    zmq_assert (!out_pipe);
 }
 
 bool zmq::session_t::read (::zmq_msg_t *msg_)
@@ -82,6 +79,7 @@ void zmq::session_t::attach_inpipe (reader_t *pipe_)
     active = true;
     in_pipe->set_endpoint (this);
 }
+
 void zmq::session_t::attach_outpipe (writer_t *pipe_)
 {
     zmq_assert (!out_pipe);
@@ -141,6 +139,16 @@ void zmq::session_t::process_unplug ()
     bool ok = owner->unregister_session (name.c_str ());
     zmq_assert (ok);
 
+    //  Ask associated pipes to terminate.
+    if (in_pipe) {
+        in_pipe->term ();
+        in_pipe = NULL;
+    }
+    if (out_pipe) {
+        out_pipe->term ();
+        out_pipe = NULL;
+    }
+
     if (engine) {
         engine->unplug ();
         delete engine;