diff --git a/lib/CodeGen/CodeGenTypes.h b/lib/CodeGen/CodeGenTypes.h
index c8bced3..1443516 100644
--- a/lib/CodeGen/CodeGenTypes.h
+++ b/lib/CodeGen/CodeGenTypes.h
@@ -148,7 +148,7 @@
   /// and/or incomplete argument types, this will return the opaque type.
   const llvm::Type *GetFunctionTypeForVtable(const CXXMethodDecl *MD);
                                                      
-  const CGRecordLayout &getCGRecordLayout(const TagDecl*) const;
+  const CGRecordLayout &getCGRecordLayout(const RecordDecl*) const;
 
   /// getLLVMFieldNo - Return llvm::StructType element number
   /// that corresponds to the field FD.