diff --git a/src/Conn.h b/src/Conn.h
index 8d1b5b974b..5b26d339ca 100644
--- a/src/Conn.h
+++ b/src/Conn.h
@@ -401,7 +401,6 @@ public:
 	void Dispatch(double t, bool is_expire) override;
 
 protected:
-	ConnectionTimer() = default;
 
 	void Init(Connection* conn, timer_func timer, bool do_expire);
 
diff --git a/src/Reassem.h b/src/Reassem.h
index 2291edb3ee..c2b9dcc203 100644
--- a/src/Reassem.h
+++ b/src/Reassem.h
@@ -292,7 +292,6 @@ public:
 	void SetMaxOldBlocks(uint32_t count)	{ max_old_blocks = count; }
 
 protected:
-	Reassembler()	{ }
 
 	friend class DataBlockList;
 
diff --git a/src/Timer.h b/src/Timer.h
index 6acb8f7dd0..433063ece4 100644
--- a/src/Timer.h
+++ b/src/Timer.h
@@ -65,7 +65,7 @@ public:
 	void Describe(ODesc* d) const;
 
 protected:
-	Timer()	= default;
+
 	TimerType type{};
 };
 
diff --git a/src/analyzer/Analyzer.cc b/src/analyzer/Analyzer.cc
index b24dc88ae4..8b1ce385c5 100644
--- a/src/analyzer/Analyzer.cc
+++ b/src/analyzer/Analyzer.cc
@@ -22,13 +22,12 @@ public:
 	void Dispatch(double t, bool is_expire) override;
 
 protected:
-	AnalyzerTimer() : analyzer(), timer(), do_expire()	{}
 
 	void Init(Analyzer* analyzer, analyzer_timer_func timer, int do_expire);
 
-	Analyzer* analyzer;
+	Analyzer* analyzer = nullptr;
 	analyzer_timer_func timer;
-	int do_expire;
+	int do_expire = 0;
 };
 
 } // namespace zeek::analyzer
diff --git a/src/analyzer/protocol/tcp/TCP_Reassembler.h b/src/analyzer/protocol/tcp/TCP_Reassembler.h
index 4993ea431b..ccd460c32a 100644
--- a/src/analyzer/protocol/tcp/TCP_Reassembler.h
+++ b/src/analyzer/protocol/tcp/TCP_Reassembler.h
@@ -82,7 +82,6 @@ public:
 		{ return seq + length <= seq_to_skip; }
 
 private:
-	TCP_Reassembler()	{ }
 
 	void Undelivered(uint64_t up_to_seq) override;
 	void Gap(uint64_t seq, uint64_t len);
diff --git a/src/file_analysis/FileReassembler.cc b/src/file_analysis/FileReassembler.cc
index 629f366de8..84261c49ea 100644
--- a/src/file_analysis/FileReassembler.cc
+++ b/src/file_analysis/FileReassembler.cc
@@ -12,11 +12,6 @@ FileReassembler::FileReassembler(File *f, uint64_t starting_offset)
 	{
 	}
 
-FileReassembler::FileReassembler()
-	: zeek::Reassembler(), the_file(nullptr), flushing(false)
-	{
-	}
-
 FileReassembler::~FileReassembler()
 	{
 	}
diff --git a/src/file_analysis/FileReassembler.h b/src/file_analysis/FileReassembler.h
index 0924198235..c04c85aeab 100644
--- a/src/file_analysis/FileReassembler.h
+++ b/src/file_analysis/FileReassembler.h
@@ -48,14 +48,13 @@ public:
 		{ return flushing; }
 
 protected:
-	FileReassembler();
 
 	void Undelivered(uint64_t up_to_seq) override;
 	void BlockInserted(zeek::DataBlockMap::const_iterator it) override;
 	void Overlap(const u_char* b1, const u_char* b2, uint64_t n) override;
 
-	File* the_file;
-	bool flushing;
+	File* the_file = nullptr;
+	bool flushing = false;
 };
 
 } // namespace analyzer::*