diff --git a/M6502/inc/mos6502.h b/M6502/inc/mos6502.h
index 170ee35..44ae15a 100644
--- a/M6502/inc/mos6502.h
+++ b/M6502/inc/mos6502.h
@@ -162,14 +162,14 @@ namespace EightBit {
 		}
 
 		uint8_t AM_AbsoluteX() {
-			if (Address_AbsoluteX())
+			if (UNLIKELY(Address_AbsoluteX()))
 				addCycle();
 			BUS().ADDRESS() = MEMPTR();
 			return getByte();
 		}
 
 		uint8_t AM_AbsoluteY() {
-			if (Address_AbsoluteY())
+			if (UNLIKELY(Address_AbsoluteY()))
 				addCycle();
 			BUS().ADDRESS() = MEMPTR();
 			return getByte();
@@ -191,7 +191,7 @@ namespace EightBit {
 		}
 
 		uint8_t AM_IndirectIndexedY() {
-			if (Address_IndirectIndexedY())
+			if (UNLIKELY(Address_IndirectIndexedY()))
 				addCycle();
 			BUS().ADDRESS() = MEMPTR();
 			return getByte();
diff --git a/M6502/src/mos6502.cpp b/M6502/src/mos6502.cpp
index c85be38..d404b27 100644
--- a/M6502/src/mos6502.cpp
+++ b/M6502/src/mos6502.cpp
@@ -336,7 +336,7 @@ int EightBit::MOS6502::execute(uint8_t cell) {
 		__assume(0);
 	}
 
-	if (cycles() == 0)
+	if (UNLIKELY(cycles() == 0))
 		throw std::logic_error("Unhandled opcode");
 
 	return cycles();
@@ -480,7 +480,7 @@ void EightBit::MOS6502::ADC_d(uint8_t data) {
 void EightBit::MOS6502::Branch(int8_t displacement) {
 	const auto page = PC().high;
 	PC().word += displacement;
-	if (PC().high != page)
+	if (UNLIKELY(PC().high != page))
 		addCycle();
 	addCycle();
 }