diff --git a/include/dwarfs/hash_util.h b/include/dwarfs/hash_util.h
deleted file mode 100644
index 94576f0a..00000000
--- a/include/dwarfs/hash_util.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/* vim:set ts=2 sw=2 sts=2 et: */
-/**
- * \author     Marcus Holland-Moritz (github@mhxnet.de)
- * \copyright  Copyright (c) Marcus Holland-Moritz
- *
- * This file is part of dwarfs.
- *
- * dwarfs is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * dwarfs is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with dwarfs.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include <string_view>
-
-#include <folly/Hash.h>
-
-namespace folly {
-
-template <>
-struct hasher<std::string_view> {
-  using folly_is_avalanching = std::true_type;
-
-  size_t operator()(std::string_view r) const {
-    return static_cast<size_t>(
-        hash::SpookyHashV2::Hash64(r.data(), r.size(), 0));
-  }
-};
-
-} // namespace folly
diff --git a/src/dwarfs/scanner.cpp b/src/dwarfs/scanner.cpp
index 7dd869e6..ac59f81f 100644
--- a/src/dwarfs/scanner.cpp
+++ b/src/dwarfs/scanner.cpp
@@ -44,7 +44,6 @@
 #include "dwarfs/error.h"
 #include "dwarfs/filesystem_writer.h"
 #include "dwarfs/global_entry_data.h"
-#include "dwarfs/hash_util.h"
 #include "dwarfs/inode.h"
 #include "dwarfs/inode_manager.h"
 #include "dwarfs/logger.h"