diff --git a/mkvmuxer/mkvmuxer.h b/mkvmuxer/mkvmuxer.h
index 1559d56..55ba071 100644
--- a/mkvmuxer/mkvmuxer.h
+++ b/mkvmuxer/mkvmuxer.h
@@ -37,14 +37,14 @@ const uint64_t kMaxTrackNumber = 126;
 class IMkvWriter {
  public:
   // Writes out |len| bytes of |buf|. Returns 0 on success.
-  virtual int32_t Write(const void* buf, uint32_t len) = 0;
+  virtual int32 Write(const void* buf, uint32 len) = 0;
 
   // Returns the offset of the output position from the beginning of the
   // output.
-  virtual int64_t Position() const = 0;
+  virtual int64 Position() const = 0;
 
   // Set the current File position. Returns 0 on success.
-  virtual int32_t Position(int64_t position) = 0;
+  virtual int32 Position(int64 position) = 0;
 
   // Returns true if the writer is seekable.
   virtual bool Seekable() const = 0;
@@ -54,7 +54,7 @@ class IMkvWriter {
   // |position| is the location in the WebM stream where the first octet of the
   // element identifier will be written.
   // Note: the |MkvId| enumeration in webmids.hpp defines element values.
-  virtual void ElementStartNotify(uint64_t element_id, int64_t position) = 0;
+  virtual void ElementStartNotify(uint64 element_id, int64 position) = 0;
 
  protected:
   IMkvWriter();
diff --git a/mkvmuxer/mkvmuxertypes.h b/mkvmuxer/mkvmuxertypes.h
index f5c80f6..e5db121 100644
--- a/mkvmuxer/mkvmuxertypes.h
+++ b/mkvmuxer/mkvmuxertypes.h
@@ -9,6 +9,15 @@
 #ifndef MKVMUXER_MKVMUXERTYPES_H_
 #define MKVMUXER_MKVMUXERTYPES_H_
 
+namespace mkvmuxer {
+typedef unsigned char uint8;
+typedef short int16;
+typedef int int32;
+typedef unsigned int uint32;
+typedef long long int64;
+typedef unsigned long long uint64;
+}  // namespace mkvmuxer
+
 // Copied from Chromium basictypes.h
 // A macro to disallow the copy constructor and operator= functions
 // This should be used in the private: declarations for a class
diff --git a/mkvmuxer/mkvwriter.cc b/mkvmuxer/mkvwriter.cc
index d7d6de9..ca48e14 100644
--- a/mkvmuxer/mkvwriter.cc
+++ b/mkvmuxer/mkvwriter.cc
@@ -20,7 +20,7 @@ MkvWriter::MkvWriter(FILE* fp) : file_(fp), writer_owns_file_(false) {}
 
 MkvWriter::~MkvWriter() { Close(); }
 
-int32_t MkvWriter::Write(const void* buffer, uint32_t length) {
+int32 MkvWriter::Write(const void* buffer, uint32 length) {
   if (!file_)
     return -1;
 
@@ -59,7 +59,7 @@ void MkvWriter::Close() {
   file_ = NULL;
 }
 
-int64_t MkvWriter::Position() const {
+int64 MkvWriter::Position() const {
   if (!file_)
     return 0;
 
@@ -70,7 +70,7 @@ int64_t MkvWriter::Position() const {
 #endif
 }
 
-int32_t MkvWriter::Position(int64_t position) {
+int32 MkvWriter::Position(int64 position) {
   if (!file_)
     return -1;
 
@@ -83,6 +83,6 @@ int32_t MkvWriter::Position(int64_t position) {
 
 bool MkvWriter::Seekable() const { return true; }
 
-void MkvWriter::ElementStartNotify(uint64_t, int64_t) {}
+void MkvWriter::ElementStartNotify(uint64, int64) {}
 
 }  // namespace mkvmuxer
diff --git a/mkvmuxer/mkvwriter.h b/mkvmuxer/mkvwriter.h
index ea6656e..4227c63 100644
--- a/mkvmuxer/mkvwriter.h
+++ b/mkvmuxer/mkvwriter.h
@@ -24,11 +24,11 @@ class MkvWriter : public IMkvWriter {
   virtual ~MkvWriter();
 
   // IMkvWriter interface
-  virtual int64_t Position() const;
-  virtual int32_t Position(int64_t position);
+  virtual int64 Position() const;
+  virtual int32 Position(int64 position);
   virtual bool Seekable() const;
-  virtual int32_t Write(const void* buffer, uint32_t length);
-  virtual void ElementStartNotify(uint64_t element_id, int64_t position);
+  virtual int32 Write(const void* buffer, uint32 length);
+  virtual void ElementStartNotify(uint64 element_id, int64 position);
 
   // Creates and opens a file for writing. |filename| is the name of the file
   // to open. This function will overwrite the contents of |filename|. Returns