diff --git a/webrtc/build/common.gypi b/webrtc/build/common.gypi
index 73608a47bb..0c47315d49 100644
--- a/webrtc/build/common.gypi
+++ b/webrtc/build/common.gypi
@@ -183,6 +183,7 @@
               '-Wno-missing-field-initializers',
             ],
             'cflags_cc': [
+              '-Wnon-virtual-dtor',
               # This is enabled for clang; enable for gcc as well.
               '-Woverloaded-virtual',
             ],
diff --git a/webrtc/test/rtp_rtcp_observer.h b/webrtc/test/rtp_rtcp_observer.h
index 652421489d..f82d27b766 100644
--- a/webrtc/test/rtp_rtcp_observer.h
+++ b/webrtc/test/rtp_rtcp_observer.h
@@ -22,6 +22,7 @@ namespace test {
 
 class RtpRtcpObserver {
  public:
+  virtual ~RtpRtcpObserver() {}
   newapi::Transport* SendTransport() {
     return &send_transport_;
   }