diff --git a/OSBindings/Mac/Clock SignalTests/68000ComparativeTests.mm b/OSBindings/Mac/Clock SignalTests/68000ComparativeTests.mm
index 6e8e840d5..88d2702b0 100644
--- a/OSBindings/Mac/Clock SignalTests/68000ComparativeTests.mm	
+++ b/OSBindings/Mac/Clock SignalTests/68000ComparativeTests.mm	
@@ -217,7 +217,7 @@ struct TestProcessor: public CPU::MC68000Mk2::BusHandler {
 - (void)testOperationClassic:(NSDictionary *)test name:(NSString *)name  {
 	auto uniqueTest68000 = std::make_unique<TestProcessor>(_ram.data());
 	auto test68000 = uniqueTest68000.get();
-	memset(_ram.data(), 0xce, _ram.size());
+	_ram.fill(0xce);
 
 	{
 		// Apply initial memory state.
@@ -299,7 +299,7 @@ struct TestProcessor: public CPU::MC68000Mk2::BusHandler {
 	// Definitively erase any prior memory contents;
 	// 0xce is arbitrary but hopefully easier to spot
 	// in potential errors than e.g. 0x00 or 0xff.
-	memset(_ram.data(), 0xce, _ram.size());
+	_ram.fill(0xce);
 
 	// Apply initial memory state.
 	NSArray<NSNumber *> *const initialMemory = test[@"initial memory"];