diff --git a/src/class_diagram/visitor/translation_unit_visitor.h b/src/class_diagram/visitor/translation_unit_visitor.h
index a95dbc87..137cb7f8 100644
--- a/src/class_diagram/visitor/translation_unit_visitor.h
+++ b/src/class_diagram/visitor/translation_unit_visitor.h
@@ -148,7 +148,7 @@ private:
         const clang::FriendDecl &f, clanguml::class_diagram::model::class_ &c);
 
     bool find_relationships(const clang::QualType &type,
-        found_relationships_t &,
+        found_relationships_t & /*relationships*/,
         clanguml::common::model::relationship_t relationship_hint);
 
     void add_relationships(clanguml::class_diagram::model::class_ &c,
diff --git a/src/common/model/diagram.h b/src/common/model/diagram.h
index 96cb0568..825aa41a 100644
--- a/src/common/model/diagram.h
+++ b/src/common/model/diagram.h
@@ -51,9 +51,9 @@ public:
     get_with_namespace(const std::string &name, const namespace_ &ns) const;
 
     diagram(const diagram &) = delete;
-    diagram(diagram &&) noexcept;
+    diagram(diagram && /*unused*/) noexcept;
     diagram &operator=(const diagram &) = delete;
-    diagram &operator=(diagram &&) noexcept;
+    diagram &operator=(diagram && /*unused*/) noexcept;
 
     void set_name(const std::string &name);
     std::string name() const;
diff --git a/src/package_diagram/model/diagram.h b/src/package_diagram/model/diagram.h
index bfdc5328..15574e37 100644
--- a/src/package_diagram/model/diagram.h
+++ b/src/package_diagram/model/diagram.h
@@ -56,7 +56,8 @@ public:
     common::optional_ref<common::model::package> get_package(
         clanguml::common::model::diagram_element::id_t id) const;
 
-    std::string to_alias(clanguml::common::model::diagram_element::id_t) const;
+    std::string to_alias(
+        clanguml::common::model::diagram_element::id_t /*id*/) const;
 
     inja::json context() const override;