diff --git a/src/name-component.cpp b/src/name-component.cpp
index b491f2e..13005dd 100644
--- a/src/name-component.cpp
+++ b/src/name-component.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2016 Regents of the University of California.
+ * Copyright (c) 2013-2017 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -30,7 +30,7 @@
 #include "util/string-helper.hpp"
 #include "util/crypto.hpp"
 
-#include <boost/lexical_cast.hpp>
+#include <boost/algorithm/string/trim.hpp>
 
 namespace ndn {
 namespace name {
@@ -92,7 +92,7 @@
 Component::fromEscapedString(const char* escapedString, size_t beginOffset, size_t endOffset)
 {
   std::string trimmedString(escapedString + beginOffset, escapedString + endOffset);
-  trim(trimmedString);
+  boost::algorithm::trim(trimmedString);
 
   if (trimmedString.compare(0, getSha256DigestUriPrefix().size(),
                             getSha256DigestUriPrefix()) == 0) {
diff --git a/src/name.cpp b/src/name.cpp
index f8b9a8c..ad15d08 100644
--- a/src/name.cpp
+++ b/src/name.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2016 Regents of the University of California.
+ * Copyright (c) 2013-2017 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -26,10 +26,10 @@
 #include "name.hpp"
 
 #include "util/time.hpp"
-#include "util/string-helper.hpp"
 #include "encoding/block.hpp"
 #include "encoding/encoding-buffer.hpp"
 
+#include <boost/algorithm/string/trim.hpp>
 #include <boost/functional/hash.hpp>
 
 namespace ndn {
@@ -61,7 +61,7 @@
 
 Name::Name(std::string uri)
 {
-  trim(uri);
+  boost::algorithm::trim(uri);
   if (uri.empty())
     return;
 
@@ -72,7 +72,7 @@
     if (iFirstSlash == std::string::npos || iColon < iFirstSlash) {
       // Omit the leading protocol such as ndn:
       uri.erase(0, iColon + 1);
-      trim(uri);
+      boost::algorithm::trim(uri);
     }
   }
 
@@ -86,12 +86,12 @@
         return;
       else {
         uri.erase(0, iAfterAuthority + 1);
-        trim(uri);
+        boost::algorithm::trim(uri);
       }
     }
     else {
       uri.erase(0, 1);
-      trim(uri);
+      boost::algorithm::trim(uri);
     }
   }
 
diff --git a/src/util/string-helper.cpp b/src/util/string-helper.cpp
index 44083b3..4a4808f 100644
--- a/src/util/string-helper.cpp
+++ b/src/util/string-helper.cpp
@@ -20,14 +20,13 @@
  */
 
 #include "string-helper.hpp"
+#include "../encoding/buffer.hpp"
 #include "../encoding/buffer-stream.hpp"
 #include "../security/transform/buffer-source.hpp"
 #include "../security/transform/hex-decode.hpp"
 #include "../security/transform/hex-encode.hpp"
 #include "../security/transform/stream-sink.hpp"
 
-#include <boost/algorithm/string/trim.hpp>
-
 #include <sstream>
 #include <iomanip>
 
@@ -109,24 +108,6 @@
   return os.buf();
 }
 
-void
-trimLeft(std::string& str)
-{
-  boost::algorithm::trim_left(str);
-}
-
-void
-trimRight(std::string& str)
-{
-  boost::algorithm::trim_right(str);
-}
-
-void
-trim(std::string& str)
-{
-  boost::algorithm::trim(str);
-}
-
 std::string
 unescape(const std::string& str)
 {
diff --git a/src/util/string-helper.hpp b/src/util/string-helper.hpp
index 7785f69..3f1a303 100644
--- a/src/util/string-helper.hpp
+++ b/src/util/string-helper.hpp
@@ -23,10 +23,11 @@
 #define NDN_UTIL_STRING_HELPER_HPP
 
 #include "../common.hpp"
-#include "../encoding/buffer.hpp"
 
 namespace ndn {
 
+class Buffer;
+
 class StringHelperError : public std::invalid_argument
 {
 public:
@@ -111,24 +112,6 @@
 fromHex(const std::string& hexString);
 
 /**
- * @brief Modify str in place to erase whitespace on the left
- */
-void
-trimLeft(std::string& str);
-
-/**
- * @brief Modify str in place to erase whitespace on the right
- */
-void
-trimRight(std::string& str);
-
-/**
- * @brief Modify str in place to erase whitespace on the left and right
- */
-void
-trim(std::string& str);
-
-/**
  * @brief Decode a percent-encoded string
  * @see RFC 3986 section 2
  *