diff --git a/llvm/lib/CodeGen/MachineInstrAnnot.cpp b/llvm/lib/CodeGen/MachineInstrAnnot.cpp
index bf4e68e..b4b41ac 100644
--- a/llvm/lib/CodeGen/MachineInstrAnnot.cpp
+++ b/llvm/lib/CodeGen/MachineInstrAnnot.cpp
@@ -18,6 +18,7 @@
 #include "llvm/iOther.h"
 #include "llvm/Type.h"
 
+namespace llvm {
 
 CallArgsDescriptor::CallArgsDescriptor(CallInst* _callInstr,
                                        TmpInstruction* _retAddrReg,
@@ -76,3 +77,5 @@
   assert(desc->getCallInst()==callInstr && "Incorrect call args descriptor?");
   return desc;
 }
+
+} // End llvm namespace