diff --git a/userspace/engine/evttype_index_ruleset.h b/userspace/engine/evttype_index_ruleset.h
index 99459940..71517fd2 100644
--- a/userspace/engine/evttype_index_ruleset.h
+++ b/userspace/engine/evttype_index_ruleset.h
@@ -43,7 +43,7 @@ struct evttype_index_wrapper {
 class evttype_index_ruleset : public indexable_ruleset<evttype_index_wrapper> {
 public:
 	explicit evttype_index_ruleset(std::shared_ptr<sinsp_filter_factory> factory);
-	virtual ~evttype_index_ruleset();
+	virtual ~evttype_index_ruleset() override;
 
 	// From filter_ruleset
 	void add(const falco_rule &rule,
diff --git a/userspace/engine/indexable_ruleset.h b/userspace/engine/indexable_ruleset.h
index 81d253f7..4da90e07 100644
--- a/userspace/engine/indexable_ruleset.h
+++ b/userspace/engine/indexable_ruleset.h
@@ -46,7 +46,7 @@ template<class filter_wrapper>
 class indexable_ruleset : public filter_ruleset {
 public:
 	indexable_ruleset() = default;
-	virtual ~indexable_ruleset() = default;
+	virtual ~indexable_ruleset() override = default;
 
 	// Required to implement filter_ruleset
 	void clear() override {
diff --git a/userspace/engine/rule_loader.h b/userspace/engine/rule_loader.h
index d80c8787..105bddde 100644
--- a/userspace/engine/rule_loader.h
+++ b/userspace/engine/rule_loader.h
@@ -228,7 +228,7 @@ public:
 class result : public falco::load_result {
 public:
 	explicit result(const std::string& name);
-	virtual ~result() = default;
+	virtual ~result() override = default;
 	result(result&&) = default;
 	result& operator=(result&&) = default;
 	result(const result&) = default;