diff --git a/src/ID.h b/src/ID.h
index 682f865a09..2c2dbcfe6e 100644
--- a/src/ID.h
+++ b/src/ID.h
@@ -143,7 +143,7 @@ public:
 	bool DoInferReturnType() const { return infer_return_type; }
 	void SetInferReturnType(bool infer) { infer_return_type = infer; }
 
-	virtual TraversalCode Traverse(TraversalCallback* cb) const;
+	TraversalCode Traverse(TraversalCallback* cb) const;
 
 	bool HasOptionHandlers() const { return ! option_handlers.empty(); }
 
diff --git a/src/analyzer/protocol/login/NVT.h b/src/analyzer/protocol/login/NVT.h
index 0ae4697bf8..240972fe7b 100644
--- a/src/analyzer/protocol/login/NVT.h
+++ b/src/analyzer/protocol/login/NVT.h
@@ -172,10 +172,10 @@ protected:
 	void DeliverChunk(int& len, const u_char*& data);
 
 	void ScanOption(int& len, const u_char*& data);
-	virtual void SawOption(unsigned int code);
-	virtual void SawOption(unsigned int code, unsigned int subcode);
-	virtual void SawSubOption(const char* opt, int len);
-	virtual void BadOptionTermination(unsigned int code);
+	void SawOption(unsigned int code);
+	void SawOption(unsigned int code, unsigned int subcode);
+	void SawSubOption(const char* opt, int len);
+	void BadOptionTermination(unsigned int code);
 	const char* PeerAuthName() const;
 
 	NVT_Analyzer* peer = nullptr;
diff --git a/src/analyzer/protocol/rpc/RPC.h b/src/analyzer/protocol/rpc/RPC.h
index 3d48c14ced..88dcfd6c83 100644
--- a/src/analyzer/protocol/rpc/RPC.h
+++ b/src/analyzer/protocol/rpc/RPC.h
@@ -234,11 +234,11 @@ protected:
 		};
 
 	void Init() override;
-	virtual bool CheckResync(int& len, const u_char*& data, bool orig);
+	bool CheckResync(int& len, const u_char*& data, bool orig);
 	void DeliverStream(int len, const u_char* data, bool orig) override;
 	void Undelivered(uint64_t seq, int len, bool orig) override;
 
-	virtual void NeedResync()
+	void NeedResync()
 		{
 		resync_state = NEED_RESYNC;
 		resync_toskip = 0;
diff --git a/src/analyzer/protocol/tcp/TCP_Reassembler.h b/src/analyzer/protocol/tcp/TCP_Reassembler.h
index 105fa9dd46..2af575132f 100644
--- a/src/analyzer/protocol/tcp/TCP_Reassembler.h
+++ b/src/analyzer/protocol/tcp/TCP_Reassembler.h
@@ -83,7 +83,7 @@ public:
 	uint64_t DataSeq() const { return LastReassemSeq(); }
 
 	void DeliverBlock(uint64_t seq, int len, const u_char* data);
-	virtual void Deliver(uint64_t seq, int len, const u_char* data);
+	void Deliver(uint64_t seq, int len, const u_char* data);
 
 	TCP_Endpoint* Endpoint() { return endp; }
 	const TCP_Endpoint* Endpoint() const { return endp; }