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--- a/libupnpp/base64.hxx
+++ b/libupnpp/base64.hxx
@@ -18,6 +18,8 @@
 #define _BASE64_H_INCLUDED_
 #include <string>
 
+namespace UPnPP {
+
 void base64_encode(const std::string& in, std::string& out);
 bool base64_decode(const std::string& in, std::string& out);
 inline std::string base64_encode(const std::string& in)
@@ -34,4 +36,6 @@
     return std::string();
 }
 
+} // namespace
+
 #endif /* _BASE64_H_INCLUDED_ */