diff --git a/include/llvm-c/lto.h b/include/llvm-c/lto.h
index c57dfe7306d..74a070342e9 100644
--- a/include/llvm-c/lto.h
+++ b/include/llvm-c/lto.h
@@ -30,9 +30,10 @@ typedef enum {
     LTO_SYMBOL_DEFINITION_TENTATIVE   = 0x00000200,    
     LTO_SYMBOL_DEFINITION_WEAK        = 0x00000300,    
     LTO_SYMBOL_DEFINITION_UNDEFINED   = 0x00000400,    
-    LTO_SYMBOL_SCOPE_MASK             = 0x00001800,    
+    LTO_SYMBOL_SCOPE_MASK             = 0x00003800,    
     LTO_SYMBOL_SCOPE_INTERNAL         = 0x00000800,    
     LTO_SYMBOL_SCOPE_HIDDEN           = 0x00001000,    
+    LTO_SYMBOL_SCOPE_PROTECTED        = 0x00002000,    
     LTO_SYMBOL_SCOPE_DEFAULT          = 0x00001800    
 } lto_symbol_attributes;
 
diff --git a/tools/lto/LTOModule.cpp b/tools/lto/LTOModule.cpp
index 7eb79053ea9..6331a59e02d 100644
--- a/tools/lto/LTOModule.cpp
+++ b/tools/lto/LTOModule.cpp
@@ -224,6 +224,8 @@ void LTOModule::addDefinedSymbol(GlobalValue* def, Mangler &mangler,
     // set scope part
     if ( def->hasHiddenVisibility() )
         attr |= LTO_SYMBOL_SCOPE_HIDDEN;
+    else if ( def->hasProtectedVisibility() )
+        attr |= LTO_SYMBOL_SCOPE_PROTECTED;
     else if ( def->hasExternalLinkage() || def->hasWeakLinkage() 
               || def->hasLinkOnceLinkage() || def->hasCommonLinkage() )
         attr |= LTO_SYMBOL_SCOPE_DEFAULT;