diff --git a/libutils/String8.cpp b/libutils/String8.cpp
index 2974aa300..195e122c6 100644
--- a/libutils/String8.cpp
+++ b/libutils/String8.cpp
@@ -25,6 +25,8 @@
 
 #include <ctype.h>
 
+#include <string>
+
 #include "SharedBuffer.h"
 
 /*
@@ -163,9 +165,7 @@ String8::String8(const char16_t* o, size_t len)
 }
 
 String8::String8(const char32_t* o)
-    : mString(allocFromUTF32(o, strlen32(o)))
-{
-}
+    : mString(allocFromUTF32(o, std::char_traits<char32_t>::length(o))) {}
 
 String8::String8(const char32_t* o, size_t len)
     : mString(allocFromUTF32(o, len))
diff --git a/libutils/Unicode.cpp b/libutils/Unicode.cpp
index 843a81afb..3ffcf7e34 100644
--- a/libutils/Unicode.cpp
+++ b/libutils/Unicode.cpp
@@ -22,20 +22,6 @@
 
 #include <log/log.h>
 
-#if defined(_WIN32)
-# undef  nhtol
-# undef  htonl
-# undef  nhtos
-# undef  htons
-
-# define ntohl(x)    ( ((x) << 24) | (((x) >> 24) & 255) | (((x) << 8) & 0xff0000) | (((x) >> 8) & 0xff00) )
-# define htonl(x)    ntohl(x)
-# define ntohs(x)    ( (((x) << 8) & 0xff00) | (((x) >> 8) & 255) )
-# define htons(x)    ntohs(x)
-#else
-# include <netinet/in.h>
-#endif
-
 extern "C" {
 
 static const char32_t kByteMask = 0x000000BF;
@@ -115,24 +101,6 @@ static inline void utf32_codepoint_to_utf8(uint8_t* dstP, char32_t srcChar, size
     }
 }
 
-size_t strlen32(const char32_t *s)
-{
-  const char32_t *ss = s;
-  while ( *ss )
-    ss++;
-  return ss-s;
-}
-
-size_t strnlen32(const char32_t *s, size_t maxlen)
-{
-  const char32_t *ss = s;
-  while ((maxlen > 0) && *ss) {
-    ss++;
-    maxlen--;
-  }
-  return ss-s;
-}
-
 static inline int32_t utf32_at_internal(const char* cur, size_t *num_read)
 {
     const char first_char = *cur;
@@ -254,19 +222,6 @@ int strncmp16(const char16_t *s1, const char16_t *s2, size_t n)
   return d;
 }
 
-char16_t *strcpy16(char16_t *dst, const char16_t *src)
-{
-  char16_t *q = dst;
-  const char16_t *p = src;
-  char16_t ch;
-
-  do {
-    *q++ = ch = *p++;
-  } while ( ch );
-
-  return dst;
-}
-
 size_t strlen16(const char16_t *s)
 {
   const char16_t *ss = s;
diff --git a/libutils/include/utils/Unicode.h b/libutils/include/utils/Unicode.h
index 00873839b..d60d5d6ba 100644
--- a/libutils/include/utils/Unicode.h
+++ b/libutils/include/utils/Unicode.h
@@ -27,7 +27,6 @@ int strcmp16(const char16_t *, const char16_t *);
 int strncmp16(const char16_t *s1, const char16_t *s2, size_t n);
 size_t strlen16(const char16_t *);
 size_t strnlen16(const char16_t *, size_t);
-char16_t *strcpy16(char16_t *, const char16_t *);
 char16_t *strstr16(const char16_t*, const char16_t*);
 
 // Version of comparison that supports embedded NULs.
@@ -39,10 +38,6 @@ char16_t *strstr16(const char16_t*, const char16_t*);
 // equivalent result as strcmp16 (unlike strncmp16).
 int strzcmp16(const char16_t *s1, size_t n1, const char16_t *s2, size_t n2);
 
-// Standard string functions on char32_t strings.
-size_t strlen32(const char32_t *);
-size_t strnlen32(const char32_t *, size_t);
-
 /**
  * Measure the length of a UTF-32 string in UTF-8. If the string is invalid
  * such as containing a surrogate character, -1 will be returned.