diff --git a/lib/cpp/src/protocol/TBinaryProtocol.h b/lib/cpp/src/protocol/TBinaryProtocol.h
index edb8834..37d33f4 100644
--- a/lib/cpp/src/protocol/TBinaryProtocol.h
+++ b/lib/cpp/src/protocol/TBinaryProtocol.h
@@ -36,8 +36,8 @@
 class TBinaryProtocolT
   : public TVirtualProtocol< TBinaryProtocolT<Transport_> > {
  protected:
-  static const int32_t VERSION_MASK = 0xffff0000;
-  static const int32_t VERSION_1 = 0x80010000;
+  static const int32_t VERSION_MASK = ((int32_t)0xffff0000);
+  static const int32_t VERSION_1 = ((int32_t)0x80010000);
   // VERSION_2 (0x80020000)  is taken by TDenseProtocol.
 
  public:
diff --git a/lib/cpp/src/protocol/TDenseProtocol.h b/lib/cpp/src/protocol/TDenseProtocol.h
index 438ed89..fc25cb7 100644
--- a/lib/cpp/src/protocol/TDenseProtocol.h
+++ b/lib/cpp/src/protocol/TDenseProtocol.h
@@ -59,9 +59,9 @@
 class TDenseProtocol
   : public TVirtualProtocol<TDenseProtocol, TBinaryProtocol> {
  protected:
-  static const int32_t VERSION_MASK = 0xffff0000;
+  static const int32_t VERSION_MASK = ((int32_t)0xffff0000);
   // VERSION_1 (0x80010000)  is taken by TBinaryProtocol.
-  static const int32_t VERSION_2 = 0x80020000;
+  static const int32_t VERSION_2 = ((int32_t)0x80020000);
 
  public:
   typedef apache::thrift::reflection::local::TypeSpec TypeSpec;