1 files changed, 3 insertions, 0 deletions
diff --git a/include/llvm/Linker.h b/include/llvm/Linker.h
index deaaca4155..3667b8521d 100644
--- a/include/llvm/Linker.h
+++ b/include/llvm/Linker.h
@@ -10,12 +10,14 @@
 #ifndef LLVM_LINKER_H
 #define LLVM_LINKER_H
 
+#include "llvm/ADT/SmallPtrSet.h"
 #include <string>
 
 namespace llvm {
 
 class Module;
 class StringRef;
+class StructType;
 
 /// This class provides the core functionality of linking in LLVM. It keeps a
 /// pointer to the merged module so far. It doesn't take ownership of the
@@ -47,6 +49,7 @@ class Linker {
 
   private:
     Module *Composite;
+    SmallPtrSet<StructType*, 32> IdentifiedStructTypes;
 };
 
 } // End llvm namespace