diff --git a/Release/include/cpprest/details/http_helpers.h b/Release/include/cpprest/details/http_helpers.h
index fd6c3c1ffa..a7c589b996 100644
--- a/Release/include/cpprest/details/http_helpers.h
+++ b/Release/include/cpprest/details/http_helpers.h
@@ -34,45 +34,16 @@ namespace web { namespace http
 namespace details
 {
 
-    /// <summary>
-    /// Constants for MIME types.
-    /// </summary>
-    class mime_types
-    {
-    public:
-    #define _MIME_TYPES
-    #define DAT(a,b) _ASYNCRTIMP const static utility::string_t a;
-    #include "cpprest/details/http_constants.dat"
-    #undef _MIME_TYPES
-    #undef DAT
-    };
-
-    /// <summary>
-    /// Constants for charset types.
-    /// </summary>
-    class charset_types
-    {
-    public:
-    #define _CHARSET_TYPES
-    #define DAT(a,b) _ASYNCRTIMP const static utility::string_t a;
-    #include "cpprest/details/http_constants.dat"
-    #undef _CHARSET_TYPES
-    #undef DAT
-    };
-
     /// <summary>
     /// Helper function to get the default HTTP reason phrase for a status code.
     /// </summary>
     utility::string_t get_default_reason_phrase(status_code code);
 
     // simple helper functions to trim whitespace.
-    _ASYNCRTIMP void __cdecl ltrim_whitespace(utility::string_t &str);
-    _ASYNCRTIMP void __cdecl rtrim_whitespace(utility::string_t &str);
     _ASYNCRTIMP void __cdecl trim_whitespace(utility::string_t &str);
 
     bool validate_method(const utility::string_t& method);
 
-
     namespace chunked_encoding
     {
         // Transfer-Encoding: chunked support
diff --git a/Release/include/cpprest/http_msg.h b/Release/include/cpprest/http_msg.h
index 9ad32d937b..90669accc4 100644
--- a/Release/include/cpprest/http_msg.h
+++ b/Release/include/cpprest/http_msg.h
@@ -89,6 +89,36 @@ class status_codes
 #undef DAT
 };
 
+namespace details {
+
+/// <summary>
+/// Constants for MIME types.
+/// </summary>
+class mime_types
+{
+public:
+#define _MIME_TYPES
+#define DAT(a,b) _ASYNCRTIMP const static utility::string_t a;
+#include "cpprest/details/http_constants.dat"
+#undef _MIME_TYPES
+#undef DAT
+};
+
+/// <summary>
+/// Constants for charset types.
+/// </summary>
+class charset_types
+{
+public:
+#define _CHARSET_TYPES
+#define DAT(a,b) _ASYNCRTIMP const static utility::string_t a;
+#include "cpprest/details/http_constants.dat"
+#undef _CHARSET_TYPES
+#undef DAT
+};
+
+}
+
 /// Message direction
 namespace message_direction
 {
diff --git a/Release/src/http/common/http_helpers.cpp b/Release/src/http/common/http_helpers.cpp
index a5baccf976..75ef626820 100644
--- a/Release/src/http/common/http_helpers.cpp
+++ b/Release/src/http/common/http_helpers.cpp
@@ -72,13 +72,13 @@ utility::string_t get_default_reason_phrase(status_code code)
 }
 
 
-void ltrim_whitespace(utility::string_t &str)
+static void ltrim_whitespace(utility::string_t &str)
 {
     size_t index;
     for (index = 0; index < str.size() && isspace(str[index]); ++index);
     str.erase(0, index);
 }
-void rtrim_whitespace(utility::string_t &str)
+static void rtrim_whitespace(utility::string_t &str)
 {
     size_t index;
     for (index = str.size(); index > 0 && isspace(str[index - 1]); --index);