diff --git a/include/libplatform/libplatform.h b/include/libplatform/libplatform.h
index c818fec1c8..2125e9746b 100644
--- a/include/libplatform/libplatform.h
+++ b/include/libplatform/libplatform.h
@@ -5,11 +5,9 @@
 #ifndef V8_LIBPLATFORM_LIBPLATFORM_H_
 #define V8_LIBPLATFORM_LIBPLATFORM_H_
 
+#include "include/v8-platform.h"
+
 namespace v8 {
-
-class Isolate;
-class Platform;
-
 namespace platform {
 
 /**
diff --git a/samples/lineprocessor.cc b/samples/lineprocessor.cc
index ce502f0736..69bfab49ba 100644
--- a/samples/lineprocessor.cc
+++ b/samples/lineprocessor.cc
@@ -29,7 +29,6 @@
 
 #include <include/libplatform/libplatform.h>
 #include <include/v8-debug.h>
-#include <include/v8-platform.h>
 
 #include <fcntl.h>
 #include <stdio.h>
diff --git a/samples/shell.cc b/samples/shell.cc
index f84838f4f7..b66e8f7453 100644
--- a/samples/shell.cc
+++ b/samples/shell.cc
@@ -28,7 +28,6 @@
 #include <include/v8.h>
 
 #include <include/libplatform/libplatform.h>
-#include <include/v8-platform.h>
 
 #include <assert.h>
 #include <fcntl.h>
diff --git a/src/d8.cc b/src/d8.cc
index c4550b65bb..fd80fcdc03 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -40,8 +40,6 @@
 #include "src/d8.h"
 
 #include "include/libplatform/libplatform.h"
-#include "include/v8-platform.h"
-
 #ifndef V8_SHARED
 #include "src/api.h"
 #include "src/base/cpu.h"
diff --git a/test/unittests/run-all-unittests.cc b/test/unittests/run-all-unittests.cc
index 7c3a7abbd4..8c361ddc36 100644
--- a/test/unittests/run-all-unittests.cc
+++ b/test/unittests/run-all-unittests.cc
@@ -4,7 +4,6 @@
 
 #include "include/libplatform/libplatform.h"
 #include "include/v8.h"
-#include "include/v8-platform.h"
 #include "src/base/compiler-specific.h"
 #include "testing/gmock/include/gmock/gmock.h"