diff --git a/src/App/GroupExtension.h b/src/App/GroupExtension.h
index 589f72854..7e24846a5 100644
--- a/src/App/GroupExtension.h
+++ b/src/App/GroupExtension.h
@@ -55,7 +55,7 @@ public:
     void addObject(DocumentObject* obj);
     /*override this function if you want only special objects
      */
-    virtual bool allowObject(DocumentObject* obj) {return true;};
+    virtual bool allowObject(DocumentObject* ) {return true;};
     
     /** Removes an object from this group.
      */
diff --git a/src/Gui/ViewProviderExtension.h b/src/Gui/ViewProviderExtension.h
index d2531cec7..636a5d50a 100644
--- a/src/Gui/ViewProviderExtension.h
+++ b/src/Gui/ViewProviderExtension.h
@@ -52,7 +52,7 @@ public:
     virtual std::vector<App::DocumentObject*> extensionClaimChildren3D(void) const { 
         return std::vector<App::DocumentObject*>(); }
         
-    virtual bool extensionOnDelete(const std::vector<std::string> &subNames){ return true;}
+    virtual bool extensionOnDelete(const std::vector<std::string> &){ return true;}
  
     virtual std::vector<App::DocumentObject*> extensionClaimChildren(void) const { 
         return std::vector<App::DocumentObject*>(); }
@@ -72,8 +72,8 @@ public:
     virtual SoSeparator* extensionGetFrontRoot(void) const {return nullptr;}
     virtual SoGroup*     extensionGetChildRoot(void) const {return nullptr;}
     virtual SoSeparator* extensionGetBackRoot(void) const {return nullptr;}
-    virtual void extensionAttach(App::DocumentObject* pcObject) { }
-    virtual void extensionSetDisplayMode(const char* ModeName) { }
+    virtual void extensionAttach(App::DocumentObject* ) { }
+    virtual void extensionSetDisplayMode(const char* ) { }
     virtual std::vector<std::string> extensionGetDisplayModes(void) const {return std::vector<std::string>();}
 
     //update data of extended opject
diff --git a/src/Gui/ViewProviderGroupExtension.cpp b/src/Gui/ViewProviderGroupExtension.cpp
index 09d1a6f69..db1ead3de 100644
--- a/src/Gui/ViewProviderGroupExtension.cpp
+++ b/src/Gui/ViewProviderGroupExtension.cpp
@@ -175,7 +175,7 @@ void ViewProviderGroupExtension::extensionHide(void) {
     this->visible = false;
 }
 
-bool ViewProviderGroupExtension::extensionOnDelete(const std::vector< std::string >& vec) {
+bool ViewProviderGroupExtension::extensionOnDelete(const std::vector< std::string >& ) {
 
     auto* group = getExtendedViewProvider()->getObject()->getExtensionByType<App::GroupExtension>();
     // If the group is nonempty ask the user if he wants to delete it's content
diff --git a/src/Mod/Fem/Gui/Command.cpp b/src/Mod/Fem/Gui/Command.cpp
index 9243b5f85..15a3ffc35 100644
--- a/src/Mod/Fem/Gui/Command.cpp
+++ b/src/Mod/Fem/Gui/Command.cpp
@@ -452,7 +452,7 @@ CmdFemConstraintTransform::CmdFemConstraintTransform()
     sPixmap         = "fem-constraint-transform";
 }
 
-void CmdFemConstraintTransform::activated(int iMsg)
+void CmdFemConstraintTransform::activated(int)
 {
     Fem::FemAnalysis        *Analysis;
 
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintTransform.cpp b/src/Mod/Fem/Gui/TaskFemConstraintTransform.cpp
index 619ed9c59..ca4164165 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintTransform.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintTransform.cpp
@@ -480,7 +480,7 @@ std::string TaskFemConstraintTransform::get_transform_type(void) const {
     return transform;
 }
 
-void TaskFemConstraintTransform::changeEvent(QEvent *e){
+void TaskFemConstraintTransform::changeEvent(QEvent *){
 }
 
 //**************************************************************************
diff --git a/src/Mod/Part/App/PartFeaturePyImp.cpp b/src/Mod/Part/App/PartFeaturePyImp.cpp
index 94a908f54..805787b63 100644
--- a/src/Mod/Part/App/PartFeaturePyImp.cpp
+++ b/src/Mod/Part/App/PartFeaturePyImp.cpp
@@ -47,7 +47,7 @@ int PartFeaturePy::setCustomAttributes(const char* , PyObject *)
     return 0; 
 }
 
-PyObject* PartFeaturePy::test(PyObject *args)
+PyObject* PartFeaturePy::test(PyObject * /*args*/)
 {
     PyErr_SetString(PyExc_NotImplementedError, "Not yet implemented");
     return 0;