diff --git a/src/cpu.rs b/src/cpu.rs
index 6f84a97..e0f1351 100644
--- a/src/cpu.rs
+++ b/src/cpu.rs
@@ -125,7 +125,7 @@ impl CPU {
     fn alu_add(&mut self, x: u8) {
         let a = self.reg.a;
         let r = a.wrapping_add(x);
-        self.reg.set_flag(Flags::C, u16::from(a) + u16::from(x) > u16::from(u8::max));
+        self.reg.set_flag(Flags::C, u16::from(a) + u16::from(x) > u16::from(u8::MAX));
         self.reg.set_flag(Flags::H, (a & 0x0F) + (a & 0x0F) > 0x0F);
         self.reg.set_flag(Flags::N, false);
         self.reg.set_flag(Flags::Z, r == 0x00);
@@ -136,7 +136,7 @@ impl CPU {
         let a = self.reg.a;
         let c = u8::from(self.reg.get_flag(Flags::C));
         let r = a.wrapping_add(x).wrapping_add(c);
-        self.reg.set_flag(Flags::C, u16::from(a) + u16::from(x) + u16::from(c) > u16::from(u8::max));
+        self.reg.set_flag(Flags::C, u16::from(a) + u16::from(x) + u16::from(c) > u16::from(u8::MAX));
         self.reg.set_flag(Flags::H, (a & 0x0F) + (a & 0x0F)  + (c & 0x0F) > 0x0F);
         self.reg.set_flag(Flags::N, false);
         self.reg.set_flag(Flags::Z, r == 0x00);