diff --git a/src/easy/easy.cpp b/src/easy/easy.cpp
index fd988c3..1f725fd 100644
--- a/src/easy/easy.cpp
+++ b/src/easy/easy.cpp
@@ -46,7 +46,7 @@ return_entity::operator const string() const
     return entity.to_string();
 }
 
-std::ostream &operator <<(std::ostream &out, const return_entity &ret)
+std::ostream &Mastodon::operator <<(std::ostream &out, const return_entity &ret)
 {
     out << ret.entity.to_string();
     return out;
diff --git a/src/mastodon-cpp.cpp b/src/mastodon-cpp.cpp
index a9c1356..2d7e4bf 100644
--- a/src/mastodon-cpp.cpp
+++ b/src/mastodon-cpp.cpp
@@ -48,7 +48,7 @@ return_call::operator const string() const
     return answer;
 }
 
-std::ostream &operator <<(std::ostream &out, const return_call &ret)
+std::ostream &Mastodon::operator <<(std::ostream &out, const return_call &ret)
 {
     out << ret.answer;
     return out;
diff --git a/src/mastodon-cpp.hpp b/src/mastodon-cpp.hpp
index 380aaac..600e539 100644
--- a/src/mastodon-cpp.hpp
+++ b/src/mastodon-cpp.hpp
@@ -60,13 +60,13 @@ namespace Mastodon
         uint16_t http_error_code = 0;
         string answer;
 
-        operator const string() const;
-        friend std::ostream &operator <<(std::ostream &out,
-                                         const return_call &ret);
-
         return_call();
         return_call(const uint8_t ec, const string &em,
                     const uint16_t hec, const string &a);
+
+        operator const string() const;
+        friend std::ostream &operator <<(std::ostream &out,
+                                         const return_call &ret);
     } return_call;
 
 /*!