diff --git a/vnr/hashutil/hashstr.h b/vnr/hashutil/hashstr.h
deleted file mode 100644
index fb13101..0000000
--- a/vnr/hashutil/hashstr.h
+++ /dev/null
@@ -1,55 +0,0 @@
-#ifndef HASHSTR_H
-#define HASHSTR_H
-
-// hashstr.h
-// 8/1/2011
-// See: http://www.cse.yorku.ca/~oz/hash.html
-
-#include "hashutil/hashutil.h"
-#include <cstdint>
-
-HASHUTIL_BEGIN_NAMESPACE
-
-enum : uint64_t { djb2_hash0 = 5381 };
-
-///  djb2: h = h*33 + c
-template <typename charT>
-inline uint64_t djb2(const charT *str, uint64_t hash = djb2_hash0)
-{
-  charT c;
-  while ((c = *str++))
-    hash = ((hash << 5) + hash) + c; // hash * 33 + c
-  return hash;
-}
-
-///  n: length
-template <typename charT>
-inline uint64_t djb2_n(const charT *str, size_t len, uint64_t hash = djb2_hash0)
-{
-  while (len--)
-    hash = ((hash << 5) + hash) + (*str++); // hash * 33 + c
-  return hash;
-}
-
-///  sdbm: hash(i) = hash(i - 1) * 65599 + str[i];
-template <typename charT>
-inline uint64_t sdbm(const charT *str, uint64_t hash = 0)
-{
-  charT c;
-  while ((c = *str++))
-     hash = c + (hash << 6) + (hash << 16) - hash;
-  return hash;
-}
-
-template <typename charT>
-inline uint64_t loselose(const charT *str, uint64_t hash = 0)
-{
-  charT c;
-  while ((c = *str++))
-    hash += c;
-  return hash;
-}
-
-HASHUTIL_END_NAMESPACE
-
-#endif // HASHSTR_H
diff --git a/vnr/hashutil/hashutil.h b/vnr/hashutil/hashutil.h
deleted file mode 100644
index 74b8597..0000000
--- a/vnr/hashutil/hashutil.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef HASHUTIL_H
-#define HASHUTIL_H
-
-// hashutil.h
-// 6/16/2015 jichi
-
-// Redefine HASHUTIL_BEGIN_NAMESPACE/HASHUTIL_END_NAMESPACE if need custom namespace
-#ifndef HASHUTIL_BEGIN_NAMESPACE
-# define HASHUTIL_BEGIN_NAMESPACE namespace hashutil {
-#endif
-#ifndef HASHUTIL_END_NAMESPACE
-# define HASHUTIL_END_NAMESPACE   } // namespace hashutil
-#endif
-
-#endif // HASHUTIL_H
diff --git a/vnr/vnrhook/CMakeLists.txt b/vnr/vnrhook/CMakeLists.txt
index 1967b45..b21d902 100644
--- a/vnr/vnrhook/CMakeLists.txt
+++ b/vnr/vnrhook/CMakeLists.txt
@@ -52,8 +52,6 @@ set(vnrhook_src
   ${PROJECT_SOURCE_DIR}/cpputil/cpptype.h
   ${PROJECT_SOURCE_DIR}/cpputil/cppunicode.h
   ${PROJECT_SOURCE_DIR}/disasm/disasm.cc
-  ${PROJECT_SOURCE_DIR}/hashutil/hashstr.h
-  ${PROJECT_SOURCE_DIR}/hashutil/hashutil.h
   ${PROJECT_SOURCE_DIR}/memdbg/memdbg.h
   ${PROJECT_SOURCE_DIR}/memdbg/memsearch.cc
   ${PROJECT_SOURCE_DIR}/memdbg/memsearch.h
diff --git a/vnr/vnrhook/src/engine/engine.cc b/vnr/vnrhook/src/engine/engine.cc
index 3c1b27f..c41b2f9 100644
--- a/vnr/vnrhook/src/engine/engine.cc
+++ b/vnr/vnrhook/src/engine/engine.cc
@@ -19,7 +19,6 @@
 #include "memdbg/memsearch.h"
 #include "ntinspect/ntinspect.h"
 #include "disasm/disasm.h"
-#include "hashutil/hashstr.h"
 #include "cpputil/cppcstring.h"
 #include "ccutil/ccmacro.h"
 #include "mono/monoobject.h"
@@ -27,7 +26,6 @@
 #include <cstdio>
 #include <string>
 
-#define hashstr hashutil::djb2
 
 // jichi 7/6/2014: read esp_base
 #define retof(esp_base)         *(DWORD *)(esp_base) // return address