diff --git a/include/llvm-c/lto.h b/include/llvm-c/lto.h
index 42c05a2fc59..cb3a6916045 100644
--- a/include/llvm-c/lto.h
+++ b/include/llvm-c/lto.h
@@ -40,7 +40,7 @@ typedef bool lto_bool_t;
  * @{
  */
 
-#define LTO_API_VERSION 16
+#define LTO_API_VERSION 17
 
 /**
  * \since prior to LTO_API_VERSION=3
@@ -63,7 +63,8 @@ typedef enum {
     LTO_SYMBOL_SCOPE_PROTECTED             = 0x00002000,
     LTO_SYMBOL_SCOPE_DEFAULT               = 0x00001800,
     LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN = 0x00002800,
-    LTO_SYMBOL_COMDAT                      = 0x00004000
+    LTO_SYMBOL_COMDAT                      = 0x00004000,
+    LTO_SYMBOL_ALIAS                       = 0x00008000
 } lto_symbol_attributes;
 
 /**
diff --git a/lib/LTO/LTOModule.cpp b/lib/LTO/LTOModule.cpp
index 6131c318024..53ed4175f8e 100644
--- a/lib/LTO/LTOModule.cpp
+++ b/lib/LTO/LTOModule.cpp
@@ -473,6 +473,9 @@ void LTOModule::addDefinedSymbol(const char *Name, const GlobalValue *def,
   if (def->hasComdat())
     attr |= LTO_SYMBOL_COMDAT;
 
+  if (isa<GlobalAlias>(def))
+    attr |= LTO_SYMBOL_ALIAS;
+
   auto Iter = _defines.insert(Name).first;
 
   // fill information structure