diff --git a/src/devpoll.cpp b/src/devpoll.cpp
index f28d55e3..0ee772b5 100644
--- a/src/devpoll.cpp
+++ b/src/devpoll.cpp
@@ -37,7 +37,8 @@
 #include "config.hpp"
 #include "i_poll_events.hpp"
 
-zmq::devpoll_t::devpoll_t ()
+zmq::devpoll_t::devpoll_t () :
+    stopping (false)
 {
     //  Get limit on open files
     struct rlimit rl;
diff --git a/src/kqueue.cpp b/src/kqueue.cpp
index f32fa361..69ad0c8c 100644
--- a/src/kqueue.cpp
+++ b/src/kqueue.cpp
@@ -33,7 +33,8 @@
 #include "config.hpp"
 #include "i_poll_events.hpp"
 
-zmq::kqueue_t::kqueue_t ()
+zmq::kqueue_t::kqueue_t () :
+    stopping (false)
 {
     //  Create event queue
     kqueue_fd = kqueue ();