diff --git a/p2p/BUILD.gn b/p2p/BUILD.gn
index ed7321384d..6dafc83b41 100644
--- a/p2p/BUILD.gn
+++ b/p2p/BUILD.gn
@@ -145,6 +145,7 @@ rtc_library("basic_port_allocator") {
 
 rtc_source_set("candidate_pair_interface") {
   sources = [ "base/candidate_pair_interface.h" ]
+  deps = [ "../api:candidate" ]
 }
 
 rtc_library("connection") {
diff --git a/p2p/base/candidate_pair_interface.h b/p2p/base/candidate_pair_interface.h
index a04ab130cf..55769dcea7 100644
--- a/p2p/base/candidate_pair_interface.h
+++ b/p2p/base/candidate_pair_interface.h
@@ -11,9 +11,9 @@
 #ifndef P2P_BASE_CANDIDATE_PAIR_INTERFACE_H_
 #define P2P_BASE_CANDIDATE_PAIR_INTERFACE_H_
 
-namespace cricket {
+#include "api/candidate.h"
 
-class Candidate;
+namespace cricket {
 
 class CandidatePairInterface {
  public: