diff --git a/BizHawk.Emulation.Cores/CPUs/LR35902/LR35902.cs b/BizHawk.Emulation.Cores/CPUs/LR35902/LR35902.cs
index 401f1fe397..e22ab03ea5 100644
--- a/BizHawk.Emulation.Cores/CPUs/LR35902/LR35902.cs
+++ b/BizHawk.Emulation.Cores/CPUs/LR35902/LR35902.cs
@@ -252,7 +252,7 @@ namespace BizHawk.Emulation.Common.Components.LR35902
 					SET_Func(cur_instr[instr_pntr++], cur_instr[instr_pntr++]);
 					break;
 				case EI:
-					EI_pending = 2;
+					if (EI_pending == 0) { EI_pending = 2; }
 					break;
 				case DI:
 					interrupts_enabled = false;