diff --git a/src/lib/mt/Thread.cpp b/src/lib/mt/Thread.cpp
index 926c5ac9a..bdc1bcdfb 100644
--- a/src/lib/mt/Thread.cpp
+++ b/src/lib/mt/Thread.cpp
@@ -108,11 +108,6 @@ bool Thread::operator==(const Thread &thread) const
   return ARCH->isSameThread(m_thread, thread.m_thread);
 }
 
-bool Thread::operator!=(const Thread &thread) const
-{
-  return !ARCH->isSameThread(m_thread, thread.m_thread);
-}
-
 void *Thread::threadFunc(void *vjob)
 {
   // get this thread's id for logging
diff --git a/src/lib/mt/Thread.h b/src/lib/mt/Thread.h
index 9fec031ab..5429ea1a3 100644
--- a/src/lib/mt/Thread.h
+++ b/src/lib/mt/Thread.h
@@ -180,13 +180,6 @@ public:
   Returns true if two Thread objects refer to the same thread.
   */
   bool operator==(const Thread &) const;
-
-  //! Compare thread handles
-  /*!
-  Returns true if two Thread objects do not refer to the same thread.
-  */
-  bool operator!=(const Thread &) const;
-
   //@}
 
 private:
diff --git a/src/lib/net/NetworkAddress.cpp b/src/lib/net/NetworkAddress.cpp
index b8e232839..e6f84569f 100644
--- a/src/lib/net/NetworkAddress.cpp
+++ b/src/lib/net/NetworkAddress.cpp
@@ -176,11 +176,6 @@ bool NetworkAddress::operator==(const NetworkAddress &addr) const
   return m_address == addr.m_address || ARCH->isEqualAddr(m_address, addr.m_address);
 }
 
-bool NetworkAddress::operator!=(const NetworkAddress &addr) const
-{
-  return !operator==(addr);
-}
-
 bool NetworkAddress::isValid() const
 {
   return (m_address != nullptr);
diff --git a/src/lib/net/NetworkAddress.h b/src/lib/net/NetworkAddress.h
index c23099c1b..b3b317778 100644
--- a/src/lib/net/NetworkAddress.h
+++ b/src/lib/net/NetworkAddress.h
@@ -70,12 +70,6 @@ public:
   */
   bool operator==(const NetworkAddress &address) const;
 
-  //! Check address inequality
-  /*!
-  Returns true if this address is not equal to \p address.
-  */
-  bool operator!=(const NetworkAddress &address) const;
-
   //! Check address validity
   /*!
   Returns true if this is not the invalid address.
diff --git a/src/lib/server/Config.cpp b/src/lib/server/Config.cpp
index 558348d79..0e39f2dd4 100644
--- a/src/lib/server/Config.cpp
+++ b/src/lib/server/Config.cpp
@@ -1438,11 +1438,6 @@ bool Config::CellEdge::operator==(const CellEdge &x) const
   return (m_side == x.m_side && m_interval == x.m_interval);
 }
 
-bool Config::CellEdge::operator!=(const CellEdge &x) const
-{
-  return !operator==(x);
-}
-
 //
 // Config::Cell
 //
@@ -1566,11 +1561,6 @@ bool Config::Cell::operator==(const Cell &x) const
   return true;
 }
 
-bool Config::Cell::operator!=(const Cell &x) const
-{
-  return !operator==(x);
-}
-
 Config::Cell::const_iterator Config::Cell::begin() const
 {
   return m_neighbors.begin();
diff --git a/src/lib/server/Config.h b/src/lib/server/Config.h
index 2587d40ef..826ed0ef8 100644
--- a/src/lib/server/Config.h
+++ b/src/lib/server/Config.h
@@ -81,7 +81,6 @@ public:
 
     // compares side and interval
     bool operator==(const CellEdge &) const;
-    bool operator!=(const CellEdge &) const;
 
   private:
     void init(const std::string_view &name, Direction side, const Interval &);
@@ -125,7 +124,6 @@ private:
     bool getLink(Direction side, float position, const CellEdge *&src, const CellEdge *&dst) const;
 
     bool operator==(const Cell &) const;
-    bool operator!=(const Cell &) const;
 
     const_iterator begin() const;
     const_iterator end() const;
@@ -189,10 +187,6 @@ public:
     {
       return (m_i == i.m_i);
     }
-    bool operator!=(const const_iterator &i) const
-    {
-      return (m_i != i.m_i);
-    }
 
   private:
     internal_const_iterator m_i;
diff --git a/src/lib/server/InputFilter.cpp b/src/lib/server/InputFilter.cpp
index ef4a78ebd..04c82d7c3 100644
--- a/src/lib/server/InputFilter.cpp
+++ b/src/lib/server/InputFilter.cpp
@@ -873,11 +873,6 @@ bool InputFilter::operator==(const InputFilter &x) const
   return (aList == bList);
 }
 
-bool InputFilter::operator!=(const InputFilter &x) const
-{
-  return !operator==(x);
-}
-
 void InputFilter::handleEvent(const Event &event)
 {
   // copy event and adjust target
diff --git a/src/lib/server/InputFilter.h b/src/lib/server/InputFilter.h
index c23812a4b..5e7e6e878 100644
--- a/src/lib/server/InputFilter.h
+++ b/src/lib/server/InputFilter.h
@@ -383,8 +383,6 @@ public:
 
   //! Compare filters
   bool operator==(const InputFilter &) const;
-  //! Compare filters
-  bool operator!=(const InputFilter &) const;
 
 private:
   // event handling