diff --git a/keepalive.cc b/keepalive.cc
index facbd25..a4333c9 100644
--- a/keepalive.cc
+++ b/keepalive.cc
@@ -12,6 +12,10 @@ KeepAlive::KeepAlive(const std::chrono::nanoseconds& max_stale, Index* index)
 	PCHECK(shutdown_ >= 0) << "eventfd()";
 }
 
+KeepAlive::~KeepAlive() {
+	PCHECK(close(shutdown_) == 0);
+}
+
 void KeepAlive::Start() {
 	thread_ = std::thread([this]() {
 		int timeout = 0;	
diff --git a/keepalive.h b/keepalive.h
index 94eea8a..fe75e4e 100644
--- a/keepalive.h
+++ b/keepalive.h
@@ -9,6 +9,8 @@ namespace firesse {
 class KeepAlive {
   public:
 	KeepAlive(const std::chrono::nanoseconds& max_stale, Index* index);
+	~KeepAlive();
+
 	void Start();
 	void Stop();