diff --git a/lib/Sema/SemaStmtAsm.cpp b/lib/Sema/SemaStmtAsm.cpp
index 8eae03c..616dcfc 100644
--- a/lib/Sema/SemaStmtAsm.cpp
+++ b/lib/Sema/SemaStmtAsm.cpp
@@ -360,6 +360,8 @@
   return false;
 }
 
+namespace {
+
 class MCAsmParserSemaCallbackImpl : public llvm::MCAsmParserSemaCallback {
   Sema *SemaRef;
 
@@ -374,6 +376,8 @@
   }
 };
 
+}
+
 NamedDecl *Sema::LookupInlineAsmIdentifier(StringRef Name, SourceLocation Loc,
                                            unsigned &Size) {
   Size = 0;