diff --git a/OSBindings/Mac/Clock SignalTests/68000Tests.mm b/OSBindings/Mac/Clock SignalTests/68000Tests.mm
index c5b3cfc58..b00ec16d3 100644
--- a/OSBindings/Mac/Clock SignalTests/68000Tests.mm	
+++ b/OSBindings/Mac/Clock SignalTests/68000Tests.mm	
@@ -49,7 +49,7 @@ class CPU::MC68000::ProcessorStorageTests {
 
 				if(!strcmp(type, "VA")) {
 					// Test for validity.
-					if(!storage.instructions[next_opcode].micro_operations) {
+					if(storage.instructions[next_opcode].micro_operations == std::numeric_limits<uint32_t>::max()) {
 						[false_invalids_ addObject:@(next_opcode)];
 					}
 					continue;
@@ -57,7 +57,7 @@ class CPU::MC68000::ProcessorStorageTests {
 
 				if(!strcmp(type, "IN")) {
 					// Test for invalidity.
-					if(storage.instructions[next_opcode].micro_operations) {
+					if(storage.instructions[next_opcode].micro_operations != std::numeric_limits<uint32_t>::max()) {
 						[false_valids_ addObject:@(next_opcode)];
 					}
 					continue;
diff --git a/Processors/68000/Implementation/68000Storage.hpp b/Processors/68000/Implementation/68000Storage.hpp
index c504e59df..6298a7d34 100644
--- a/Processors/68000/Implementation/68000Storage.hpp
+++ b/Processors/68000/Implementation/68000Storage.hpp
@@ -344,7 +344,8 @@ class ProcessorStorage {
 			remaining fields, with no additional padding being inserted by the compiler.
 		*/
 		struct Program {
-			/// The offset into the all_micro_ops_ at which micro-ops for this instruction begin.
+			/// The offset into the all_micro_ops_ at which micro-ops for this instruction begin,
+			/// or std::numeric_limits<uint32_t>::max() if this is an invalid Program.
 			uint32_t micro_operations = std::numeric_limits<uint32_t>::max();
 			/// The overarching operation applied by this program when the moment comes.
 			Operation operation;