diff --git a/AUTHORS b/AUTHORS
index 3ed6b6c1eb..32cff7bd7a 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -46,6 +46,7 @@ Steve Reid <sreid@sea-to-sky.net>
 Vladimir Beloborodov <VladimirTechMan@gmail.com>
 Vicken Simonian <vsimon@gmail.com>
 Victor Costan <costan@gmail.com>
+Stefan Gula <steweg@gmail.com>
 
 &yet LLC <*@andyet.com>
 Agora IO <*@agora.io>
diff --git a/webrtc/p2p/base/transportdescription.h b/webrtc/p2p/base/transportdescription.h
index e7f9263b3e..6f4e9a4bf1 100644
--- a/webrtc/p2p/base/transportdescription.h
+++ b/webrtc/p2p/base/transportdescription.h
@@ -147,7 +147,7 @@ struct TransportDescription {
   void AddOption(const std::string& option) {
     transport_options.push_back(option);
   }
-  bool secure() const { return identity_fingerprint != NULL; }
+  bool secure() const { return identity_fingerprint != nullptr; }
 
   IceParameters GetIceParameters() {
     return IceParameters(ice_ufrag, ice_pwd, HasOption(ICE_RENOMINATION_STR));
diff --git a/webrtc/pc/videocapturertracksource.cc b/webrtc/pc/videocapturertracksource.cc
index 2c64b42a07..216362b188 100644
--- a/webrtc/pc/videocapturertracksource.cc
+++ b/webrtc/pc/videocapturertracksource.cc
@@ -262,7 +262,7 @@ rtc::scoped_refptr<VideoTrackSourceInterface> VideoCapturerTrackSource::Create(
     const webrtc::MediaConstraintsInterface* constraints,
     bool remote) {
   RTC_DCHECK(worker_thread != NULL);
-  RTC_DCHECK(capturer != NULL);
+  RTC_DCHECK(capturer != nullptr);
   rtc::scoped_refptr<VideoCapturerTrackSource> source(
       new rtc::RefCountedObject<VideoCapturerTrackSource>(
           worker_thread, std::move(capturer), remote));
@@ -275,7 +275,7 @@ rtc::scoped_refptr<VideoTrackSourceInterface> VideoCapturerTrackSource::Create(
     std::unique_ptr<cricket::VideoCapturer> capturer,
     bool remote) {
   RTC_DCHECK(worker_thread != NULL);
-  RTC_DCHECK(capturer != NULL);
+  RTC_DCHECK(capturer != nullptr);
   rtc::scoped_refptr<VideoCapturerTrackSource> source(
       new rtc::RefCountedObject<VideoCapturerTrackSource>(
           worker_thread, std::move(capturer), remote));