diff --git a/bolt/include/bolt/Rewrite/RewriteInstance.h b/bolt/include/bolt/Rewrite/RewriteInstance.h
--- a/bolt/include/bolt/Rewrite/RewriteInstance.h
+++ b/bolt/include/bolt/Rewrite/RewriteInstance.h
@@ -89,8 +89,6 @@
   }
 
 private:
-  using ELF64LEPhdrTy = object::ELF64LEFile::Elf_Phdr;
-
   /// Populate array of binary functions and other objects of interest
   /// from meta data in the file.
   void discoverFileObjects();
diff --git a/bolt/lib/Rewrite/RewriteInstance.cpp b/bolt/lib/Rewrite/RewriteInstance.cpp
--- a/bolt/lib/Rewrite/RewriteInstance.cpp
+++ b/bolt/lib/Rewrite/RewriteInstance.cpp
@@ -305,6 +305,8 @@
 } // namespace bolt
 } // namespace llvm
 
+using ELF64LEPhdrTy = ELF64LEFile::Elf_Phdr;
+
 namespace {
 
 bool refersToReorderedSection(ErrorOr<BinarySection &> Section) {