diff --git a/talk/app/webrtc/webrtcsession_unittest.cc b/talk/app/webrtc/webrtcsession_unittest.cc
index 0319b21b06..ed089ef1d4 100644
--- a/talk/app/webrtc/webrtcsession_unittest.cc
+++ b/talk/app/webrtc/webrtcsession_unittest.cc
@@ -1477,7 +1477,7 @@ class WebRtcSessionTest
   // Last values received from data channel creation signal.
   std::string last_data_channel_label_;
   InternalDataChannelInit last_data_channel_config_;
-  bool session_destroyed_;
+  bool session_destroyed_ = false;
 };
 
 TEST_P(WebRtcSessionTest, TestInitializeWithDtls) {