diff --git a/tools/versioner/src/DeclarationDatabase.h b/tools/versioner/src/DeclarationDatabase.h
index 4ec15d9..6f577a5 100644
--- a/tools/versioner/src/DeclarationDatabase.h
+++ b/tools/versioner/src/DeclarationDatabase.h
@@ -27,6 +27,7 @@
 #include <llvm/ADT/StringRef.h>
 
 #include "Arch.h"
+#include "CompilationType.h"
 #include "Utils.h"
 
 namespace clang {
@@ -40,28 +41,6 @@
   inconsistent,
 };
 
-struct CompilationType {
-  Arch arch;
-  int api_level;
-  int file_offset_bits;
-
- private:
-  auto tie() const {
-    return std::tie(arch, api_level, file_offset_bits);
-  }
-
- public:
-  bool operator<(const CompilationType& other) const {
-    return tie() < other.tie();
-  }
-
-  bool operator==(const CompilationType& other) const {
-    return tie() == other.tie();
-  }
-};
-
-std::string to_string(const CompilationType& type);
-
 struct AvailabilityValues {
   bool future = false;
   int introduced = 0;