diff --git a/Machines/Atari2600/Atari2600.cpp b/Machines/Atari2600/Atari2600.cpp
index 5cfcb92d7..4d12af989 100644
--- a/Machines/Atari2600/Atari2600.cpp
+++ b/Machines/Atari2600/Atari2600.cpp
@@ -14,7 +14,6 @@ using namespace Atari2600;
 static const int horizontalTimerReload = 227;
 
 Machine::Machine() :
-	_timestamp(0),
 	_horizontalTimer(0),
 	_lastOutputStateDuration(0),
 	_lastOutputState(OutputState::Sync),
@@ -257,8 +256,6 @@ void Machine::output_pixels(unsigned int count)
 
 		if(!_horizontalTimer)
 			_vBlankExtend = false;
-
-		_timestamp ++;
 	}
 }
 
diff --git a/Machines/Atari2600/Atari2600.hpp b/Machines/Atari2600/Atari2600.hpp
index 46f990ba2..12b0c4d9e 100644
--- a/Machines/Atari2600/Atari2600.hpp
+++ b/Machines/Atari2600/Atari2600.hpp
@@ -37,8 +37,6 @@ class Machine: public CPU6502::Processor<Machine> {
 		uint8_t *_rom, *_romPages[4], _ram[128];
 		size_t _rom_size;
 
-		uint64_t _timestamp;
-
 		// the timer
 		unsigned int _piaTimerValue;
 		unsigned int _piaTimerShift, _writtenPiaTimerShift;