diff --git a/include/znc/Query.h b/include/znc/Query.h
index fc4422c3..8627f9bd 100644
--- a/include/znc/Query.h
+++ b/include/znc/Query.h
@@ -31,6 +31,9 @@ public:
 	CQuery(const CString& sName, CIRCNetwork* pNetwork);
 	~CQuery();
 
+	CQuery(const CQuery&) = delete;
+	CQuery& operator=(const CQuery&) = delete;
+
 	// Buffer
 	const CBuffer& GetBuffer() const { return m_Buffer; }
 	unsigned int GetBufferCount() const { return m_Buffer.GetLineCount(); }
diff --git a/include/znc/Socket.h b/include/znc/Socket.h
index 26b683a5..ea87a696 100644
--- a/include/znc/Socket.h
+++ b/include/znc/Socket.h
@@ -140,6 +140,9 @@ private:
 	struct TDNSTask {
 		TDNSTask() : sHostname(""), iPort(0), sSockName(""), iTimeout(0), bSSL(false), sBindhost(""), pcSock(nullptr), bDoneTarget(false), bDoneBind(false), aiTarget(nullptr), aiBind(nullptr) {}
 
+		TDNSTask(const TDNSTask&) = delete;
+		TDNSTask& operator=(const TDNSTask&) = delete;
+
 		CString   sHostname;
 		u_short   iPort;
 		CString   sSockName;
@@ -157,6 +160,9 @@ private:
 	public:
 		CDNSJob() : sHostname(""), task(nullptr), pManager(nullptr), bBind(false), iRes(0), aiResult(nullptr) {}
 
+		CDNSJob(const CDNSJob&) = delete;
+		CDNSJob& operator=(const CDNSJob&) = delete;
+
 		CString       sHostname;
 		TDNSTask*     task;
 		CSockManager* pManager;
diff --git a/include/znc/Utils.h b/include/znc/Utils.h
index a0b4cf8b..d18acb9c 100644
--- a/include/znc/Utils.h
+++ b/include/znc/Utils.h
@@ -222,6 +222,9 @@ public:
 	CBlowfish(const CString & sPassword, int iEncrypt, const CString & sIvec = "");
 	~CBlowfish();
 
+	CBlowfish(const CBlowfish&) = default;
+	CBlowfish& operator=(const CBlowfish&) = default;
+
 	//! output must be freed
 	static unsigned char *MD5(const unsigned char *input, u_int ilen);
 
diff --git a/src/IRCNetwork.cpp b/src/IRCNetwork.cpp
index 98ee955d..1948f546 100644
--- a/src/IRCNetwork.cpp
+++ b/src/IRCNetwork.cpp
@@ -37,6 +37,9 @@ public:
 
 	virtual ~CIRCNetworkPingTimer() {}
 
+	CIRCNetworkPingTimer(const CIRCNetworkPingTimer&) = delete;
+	CIRCNetworkPingTimer& operator=(const CIRCNetworkPingTimer&) = delete;
+
 protected:
 	void RunJob() override {
 		CIRCSock* pIRCSock = m_pNetwork->GetIRCSock();
@@ -66,6 +69,9 @@ public:
 
 	virtual ~CIRCNetworkJoinTimer() {}
 
+	CIRCNetworkJoinTimer(const CIRCNetworkJoinTimer&) = delete;
+	CIRCNetworkJoinTimer& operator=(const CIRCNetworkJoinTimer&) = delete;
+
 	void Delay(unsigned short int uDelay) {
 		m_bDelayed = true;
 		Start(uDelay);
diff --git a/src/IRCSock.cpp b/src/IRCSock.cpp
index b1603a2e..9c3748ec 100644
--- a/src/IRCSock.cpp
+++ b/src/IRCSock.cpp
@@ -41,6 +41,8 @@ class CIRCFloodTimer : public CCron {
 		CIRCFloodTimer(CIRCSock* pSock) : m_pSock(pSock) {
 			StartMaxCycles(m_pSock->m_fFloodRate, 0);
 		}
+		CIRCFloodTimer(const CIRCFloodTimer&) = delete;
+		CIRCFloodTimer& operator=(const CIRCFloodTimer&) = delete;
 		void RunJob() override {
 			if (m_pSock->m_iSendsAllowed < m_pSock->m_uFloodBurst) {
 				m_pSock->m_iSendsAllowed++;
diff --git a/src/User.cpp b/src/User.cpp
index ea5daf2b..151ef9d3 100644
--- a/src/User.cpp
+++ b/src/User.cpp
@@ -34,6 +34,9 @@ public:
 	}
 	virtual ~CUserTimer() {}
 
+	CUserTimer(const CUserTimer&) = delete;
+	CUserTimer& operator=(const CUserTimer&) = delete;
+
 private:
 protected:
 	void RunJob() override {
diff --git a/src/WebModules.cpp b/src/WebModules.cpp
index a1fa26fb..a5c79927 100644
--- a/src/WebModules.cpp
+++ b/src/WebModules.cpp
@@ -53,6 +53,9 @@ public:
 	CWebAuth(CWebSock* pWebSock, const CString& sUsername, const CString& sPassword, bool bBasic);
 	virtual ~CWebAuth() {}
 
+	CWebAuth(const CWebAuth&) = delete;
+	CWebAuth& operator=(const CWebAuth&) = delete;
+
 	void SetWebSock(CWebSock* pWebSock) { m_pWebSock = pWebSock; }
 	void AcceptedLogin(CUser& User) override;
 	void RefusedLogin(const CString& sReason) override;