diff --git a/src/jrd/trace/TraceObjects.h b/src/jrd/trace/TraceObjects.h
index 00b0d466228..c94f05480ce 100644
--- a/src/jrd/trace/TraceObjects.h
+++ b/src/jrd/trace/TraceObjects.h
@@ -503,6 +503,8 @@ class TraceDescriptors
 	{
 	}
 
+	virtual ~TraceDescriptors() = default;
+
 	FB_SIZE_T getCount()
 	{
 		fillParams();
@@ -543,7 +545,7 @@ class TraceDscFromValues : public TraceDescriptors
 	{}
 
 protected:
-	void fillParams();
+	void fillParams() override;
 
 private:
 	Request* const m_request;
@@ -561,7 +563,7 @@ class TraceDscFromMsg : public TraceDescriptors
 	{}
 
 protected:
-	void fillParams();
+	void fillParams() override;
 
 private:
 	const Format* const m_format;
@@ -585,7 +587,7 @@ class TraceDscFromDsc : public TraceDescriptors
 	}
 
 protected:
-	void fillParams() {}
+	void fillParams() override {}
 };