diff --git a/OSBindings/Mac/Clock SignalTests/Bridges/TestMachineZ80.mm b/OSBindings/Mac/Clock SignalTests/Bridges/TestMachineZ80.mm
index 37f64f599..9e1ae04db 100644
--- a/OSBindings/Mac/Clock SignalTests/Bridges/TestMachineZ80.mm	
+++ b/OSBindings/Mac/Clock SignalTests/Bridges/TestMachineZ80.mm	
@@ -127,7 +127,7 @@ static CPU::Z80::Register registerForRegister(CSTestMachineZ80Register reg) {
 }
 
 - (void)runForNumberOfCycles:(int)cycles {
-	_processor->run_for_cycles(cycles);
+	_processor->run_for(Cycles(cycles));
 }
 
 - (void)setValue:(uint16_t)value forRegister:(CSTestMachineZ80Register)reg {
diff --git a/Processors/Z80/Z80AllRAM.cpp b/Processors/Z80/Z80AllRAM.cpp
index ba5084719..7cba2c192 100644
--- a/Processors/Z80/Z80AllRAM.cpp
+++ b/Processors/Z80/Z80AllRAM.cpp
@@ -63,8 +63,8 @@ class ConcreteAllRAMProcessor: public AllRAMProcessor, public Processor<Concrete
 			return 0;
 		}
 
-		void run_for_cycles(int cycles) {
-			CPU::Z80::Processor<ConcreteAllRAMProcessor>::run_for_cycles(cycles);
+		void run_for(const Cycles &cycles) {
+			CPU::Z80::Processor<ConcreteAllRAMProcessor>::run_for(cycles);
 		}
 
 		uint16_t get_value_of_register(Register r) {
diff --git a/Processors/Z80/Z80AllRAM.hpp b/Processors/Z80/Z80AllRAM.hpp
index 69b1c874f..9b68d1054 100644
--- a/Processors/Z80/Z80AllRAM.hpp
+++ b/Processors/Z80/Z80AllRAM.hpp
@@ -28,7 +28,7 @@ class AllRAMProcessor:
 			delegate_ = delegate;
 		}
 
-		virtual void run_for_cycles(int cycles) = 0;
+		virtual void run_for(const Cycles &cycles) = 0;
 		virtual uint16_t get_value_of_register(Register r) = 0;
 		virtual void set_value_of_register(Register r, uint16_t value) = 0;
 		virtual bool get_halt_line() = 0;