diff --git a/include/llvm/Bitcode/Serialize.h b/include/llvm/Bitcode/Serialize.h
index f31493f3419..d73a92c59a0 100644
--- a/include/llvm/Bitcode/Serialize.h
+++ b/include/llvm/Bitcode/Serialize.h
@@ -31,8 +31,7 @@ class Serializer {
   MapTy PtrMap;
   
 public:
-  Serializer(BitstreamWriter& stream, unsigned BlockID = 8);
-  
+  Serializer(BitstreamWriter& stream);
   ~Serializer();
   
   template <typename T>
diff --git a/lib/Bitcode/Writer/Serialize.cpp b/lib/Bitcode/Writer/Serialize.cpp
index 8e3bb1b1aad..4395b90a89d 100644
--- a/lib/Bitcode/Writer/Serialize.cpp
+++ b/lib/Bitcode/Writer/Serialize.cpp
@@ -16,12 +16,8 @@
 
 using namespace llvm;
 
-Serializer::Serializer(BitstreamWriter& stream, unsigned BlockID)
-  : Stream(stream), BlockLevel(0) {
-    
-  if (BlockID >= 8)
-    EnterBlock(8,3);
-}
+Serializer::Serializer(BitstreamWriter& stream)
+  : Stream(stream), BlockLevel(0) {}
 
 Serializer::~Serializer() {
   if (inRecord())