diff --git a/BizHawk.Emulation.Cores/Consoles/Sega/SMS/SMS.IDebuggable.cs b/BizHawk.Emulation.Cores/Consoles/Sega/SMS/SMS.IDebuggable.cs
index 009cd5fd4c..d8b0d15402 100644
--- a/BizHawk.Emulation.Cores/Consoles/Sega/SMS/SMS.IDebuggable.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Sega/SMS/SMS.IDebuggable.cs
@@ -33,7 +33,7 @@ namespace BizHawk.Emulation.Cores.Sega.MasterSystem
 				["Shadow BC"] = Cpu.Regs[Cpu.C_s] + (Cpu.Regs[Cpu.B_s] << 8),
 				["Shadow DE"] = Cpu.Regs[Cpu.E_s] + (Cpu.Regs[Cpu.D_s] << 8),
 				["Shadow HL"] = Cpu.Regs[Cpu.L_s] + (Cpu.Regs[Cpu.H_s] << 8),
-				["SP"] = Cpu.Regs[Cpu.Iyl] + (Cpu.Regs[Cpu.Iyh] << 8),
+				["SP"] = Cpu.Regs[Cpu.SPl] + (Cpu.Regs[Cpu.SPh] << 8),
 				["Flag C"] = Cpu.FlagC,
 				["Flag N"] = Cpu.FlagN,
 				["Flag P/V"] = Cpu.FlagP,