diff --git a/p2p/base/port_interface.h b/p2p/base/port_interface.h
index f774b3d..c7242d9 100644
--- a/p2p/base/port_interface.h
+++ b/p2p/base/port_interface.h
@@ -55,7 +55,7 @@ class PortInterface {
   virtual ~PortInterface();
 
   virtual IceCandidateType Type() const = 0;
-  virtual const Network* Network() const = 0;
+  virtual const ::webrtc::Network* Network() const = 0;
 
   // Methods to set/get ICE role and tiebreaker values.
   virtual void SetIceRole(IceRole role) = 0;
diff --git a/pc/codec_vendor.h b/pc/codec_vendor.h
index 1472225..251afbd 100644
--- a/pc/codec_vendor.h
+++ b/pc/codec_vendor.h
@@ -119,7 +119,7 @@ class CodecVendor {
 class CodecLookupHelper {
  public:
   virtual ~CodecLookupHelper() = default;
-  virtual PayloadTypeSuggester* PayloadTypeSuggester() = 0;
+  virtual ::webrtc::PayloadTypeSuggester* PayloadTypeSuggester() = 0;
   // Look up the codec vendor to use, depending on context.
   // This call may get additional arguments in the future, to aid
   // in selection of the correct context.
diff --git a/pc/jsep_transport.h b/pc/jsep_transport.h
index ab914f3..3ff6f6f 100644
--- a/pc/jsep_transport.h
+++ b/pc/jsep_transport.h
@@ -214,7 +214,7 @@ class JsepTransport {
     return rtp_dtls_transport_;
   }
 
-  scoped_refptr<SctpTransport> SctpTransport() const { return sctp_transport_; }
+  scoped_refptr<::webrtc::SctpTransport> SctpTransport() const { return sctp_transport_; }
 
   // TODO(bugs.webrtc.org/9719): Delete method, update callers to use
   // SctpTransport() instead.