diff --git a/Source/Core/Core/DSP/Jit/x64/DSPJitUtil.cpp b/Source/Core/Core/DSP/Jit/x64/DSPJitUtil.cpp
index 896fd30d40..4957947b40 100644
--- a/Source/Core/Core/DSP/Jit/x64/DSPJitUtil.cpp
+++ b/Source/Core/Core/DSP/Jit/x64/DSPJitUtil.cpp
@@ -109,12 +109,6 @@ void DSPEmitter::dsp_op_write_reg(int reg, Gen::X64Reg host_sreg)
 {
   switch (reg & 0x1f)
   {
-  // 8-bit sign extended registers.
-  case DSP_REG_ACH0:
-  case DSP_REG_ACH1:
-    m_gpr.WriteReg(reg, R(host_sreg));
-    break;
-
   // Stack registers.
   case DSP_REG_ST0:
   case DSP_REG_ST1:
@@ -133,11 +127,6 @@ void DSPEmitter::dsp_op_write_reg_imm(int reg, u16 val)
 {
   switch (reg & 0x1f)
   {
-  // 8-bit sign extended registers. Should look at prod.h too...
-  case DSP_REG_ACH0:
-  case DSP_REG_ACH1:
-    m_gpr.WriteReg(reg, Imm16((u16)(s16)(s8)(u8)val));
-    break;
   // Stack registers.
   case DSP_REG_ST0:
   case DSP_REG_ST1: