diff --git a/src/processor/instructions/primitives.rs b/src/processor/instructions/primitives.rs
index 719d9a5..0520a1d 100644
--- a/src/processor/instructions/primitives.rs
+++ b/src/processor/instructions/primitives.rs
@@ -144,7 +144,6 @@ impl Cpu {
         let (result, carry) = first.overflowing_add(second);
         self.clear_flag(Flags::NSubtract);
         self.set_or_clear_flag(Flags::Carry, carry);
-        self.set_or_clear_flag(Flags::Zero, result == 0x0);
         self.set_or_clear_flag(
             Flags::HalfCarry,
             (((first & 0xFFF).wrapping_add(second & 0xFFF)) & 0x1000) == 0x1000,