diff --git a/src/cpu.rs b/src/cpu.rs
index 28dcd69..965e967 100644
--- a/src/cpu.rs
+++ b/src/cpu.rs
@@ -822,6 +822,10 @@ impl CPU {
             Insn::Stop => self.stop(),
             Insn::Halt => self.halt(),
 
+            Insn::Ld(R8::B, R8::B) => {
+                let _ = self.ld(R8::B, R8::B, bus);
+                Err(Error { kind: HitBreak(self.pc(), self.m_cycles + 1) })
+            }
             Insn::Ld(dst, src) => self.ld(dst, src, bus),
             Insn::LdImm(dst) => self.ld_imm(dst, bus),
             Insn::LdImm16(dst) => self.ld_imm16(dst, bus),