diff --git a/arangod/Agency/AgencyComm.cpp b/arangod/Agency/AgencyComm.cpp
index e4c6ba366b..2fedaa1437 100644
--- a/arangod/Agency/AgencyComm.cpp
+++ b/arangod/Agency/AgencyComm.cpp
@@ -572,14 +572,6 @@ void AgencyCommManager::failedNonLocking(
   
 }
 
-template<class T>
-inline std::ostream& operator<<(std::ostream& o, std::deque<T> const& d) {
-  for (const auto& i : d) {
-    o << i << " ";
-  }
-  return o;
-}
-
 std::string AgencyCommManager::redirect(
     std::unique_ptr<httpclient::GeneralClientConnection> connection,
     std::string const& endpoint, std::string const& location,
diff --git a/arangod/Agency/State.cpp b/arangod/Agency/State.cpp
index 50d824a277..4a5bff76ab 100644
--- a/arangod/Agency/State.cpp
+++ b/arangod/Agency/State.cpp
@@ -478,14 +478,6 @@ bool State::createCollection(std::string const& name) {
   return true;
 }
 
-template <class T>
-std::ostream& operator<<(std::ostream& o, std::deque<T> const& d) {
-  for (auto const& i : d) {
-    o << i;
-  }
-  return o;
-}
-
 /// Load collections
 bool State::loadCollections(TRI_vocbase_t* vocbase,
                             QueryRegistry* queryRegistry, bool waitForSync) {
diff --git a/lib/Basics/debugging.h b/lib/Basics/debugging.h
index 420ad37b3f..f3d45c7110 100644
--- a/lib/Basics/debugging.h
+++ b/lib/Basics/debugging.h
@@ -114,4 +114,121 @@ void TRI_ShutdownDebugging();
 void TRI_FlushDebugging();
 void TRI_FlushDebugging(char const* file, int line, char const* message);
 
+////////////////////////////////////////////////////////////////////////////////
+/// @brief dump vector contents to an ostream
+////////////////////////////////////////////////////////////////////////////////
+
+template <typename T>
+std::ostream& operator<<(std::ostream& stream, std::vector<T> const& data) {
+  bool first = true;
+
+  stream << "[";
+  for (auto const& it : data) {
+    if (first) {
+      stream << " ";
+      first = false;
+    } else {
+      stream << ", ";
+    }
+    stream << it;
+  }
+  stream << " ]";
+
+  return stream;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+/// @brief dump deque contents to an ostream
+////////////////////////////////////////////////////////////////////////////////
+
+template <typename T>
+std::ostream& operator<<(std::ostream& stream, std::deque<T> const& data) {
+  bool first = true;
+
+  stream << "[";
+  for (auto const& it : data) {
+    if (first) {
+      stream << " ";
+      first = false;
+    } else {
+      stream << ", ";
+    }
+    stream << it;
+  }
+  stream << " ]";
+
+  return stream;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+/// @brief dump unordered_set contents to an ostream
+////////////////////////////////////////////////////////////////////////////////
+
+template <typename T>
+std::ostream& operator<<(std::ostream& stream,
+                         std::unordered_set<T> const& data) {
+  bool first = true;
+
+  stream << "{";
+  for (auto const& it : data) {
+    if (first) {
+      stream << " ";
+      first = false;
+    } else {
+      stream << ", ";
+    }
+    stream << it;
+  }
+  stream << " }";
+
+  return stream;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+/// @brief dump unordered_map contents to an ostream
+////////////////////////////////////////////////////////////////////////////////
+
+template <typename K, typename V>
+std::ostream& operator<<(std::ostream& stream,
+                         std::unordered_map<K, V> const& data) {
+  bool first = true;
+
+  stream << "{";
+  for (auto const& it : data) {
+    if (first) {
+      stream << " ";
+      first = false;
+    } else {
+      stream << ", ";
+    }
+    stream << it.first << ": " << it.second;
+  }
+  stream << " }";
+
+  return stream;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+/// @brief dump unordered_map contents to an ostream
+////////////////////////////////////////////////////////////////////////////////
+
+template <typename K, typename V>
+std::ostream& operator<<(std::ostream& stream, std::map<K, V> const& data) {
+  bool first = true;
+
+  stream << "{";
+  for (auto const& it : data) {
+    if (first) {
+      stream << " ";
+      first = false;
+    } else {
+      stream << ", ";
+    }
+    stream << it.first << ": " << it.second;
+  }
+  stream << " }";
+
+  return stream;
+}
+
 #endif
diff --git a/lib/Logger/LoggerStream.h b/lib/Logger/LoggerStream.h
index 7dab9306c8..2c263ef405 100644
--- a/lib/Logger/LoggerStream.h
+++ b/lib/Logger/LoggerStream.h
@@ -88,52 +88,6 @@ class LoggerStream {
     return *this;
   }
 
-  template <typename T>
-  LoggerStream& operator<<(std::vector<T> const& obj) {
-    _out << '[';
-    size_t i = 0;
-    size_t const n = obj.size();
-    for (auto const& it : obj) {
-      _out << it;
-      if (++i < n) {
-        _out << ", ";
-      }
-    }
-    _out << ']';
-    return *this;
-  }
-
-  template <typename T>
-  LoggerStream& operator<<(std::unordered_set<T> const& obj) {
-    _out << '{';
-    size_t i = 0;
-    size_t const n = obj.size();
-    for (auto const& it : obj) {
-      _out << it;
-      if (++i < n) {
-        _out << ", ";
-      }
-    }
-    _out << '}';
-    return *this;
-  }
-  
-  template <typename K, typename V>
-  LoggerStream& operator<<(std::unordered_map<K, V> const& obj) {
-    _out << '{';
-    size_t i = 0;
-    size_t n = obj.size();
-    for (auto const& it : obj) {
-      _out << it;
-      if (++i < n) {
-        _out << ", ";
-      }
-      _out << it.first << " => " << it.second;
-    }
-    _out << '}';
-    return *this;
-  }
-
  private:
   std::stringstream _out;
   size_t _topicId;