diff --git a/src/core/cpu_core.cpp b/src/core/cpu_core.cpp
index f7cd0f48a..9dbc09314 100644
--- a/src/core/cpu_core.cpp
+++ b/src/core/cpu_core.cpp
@@ -716,7 +716,7 @@ restart_instruction:
           const u32 add_value = ReadReg(inst.r.rt);
           const u32 new_value = old_value + add_value;
           if constexpr (pgxp_mode >= PGXPMode::CPU)
-            PGXP::CPU_ADDU(inst.bits, new_value, old_value, add_value);
+            PGXP::CPU_ADD(inst.bits, new_value, old_value, add_value);
           else if constexpr (pgxp_mode >= PGXPMode::Memory)
           {
             if (add_value == 0)
@@ -752,7 +752,7 @@ restart_instruction:
         {
           const u32 new_value = ReadReg(inst.r.rs) - ReadReg(inst.r.rt);
           if constexpr (pgxp_mode >= PGXPMode::CPU)
-            PGXP::CPU_SUBU(inst.bits, new_value, ReadReg(inst.r.rs), ReadReg(inst.r.rt));
+            PGXP::CPU_SUB(inst.bits, new_value, ReadReg(inst.r.rs), ReadReg(inst.r.rt));
 
           WriteReg(inst.r.rd, new_value);
         }
@@ -1009,7 +1009,7 @@ restart_instruction:
       const u32 new_value = old_value + add_value;
 
       if constexpr (pgxp_mode >= PGXPMode::CPU)
-        PGXP::CPU_ADDIU(inst.bits, new_value, ReadReg(inst.i.rs));
+        PGXP::CPU_ADDI(inst.bits, new_value, ReadReg(inst.i.rs));
       else if constexpr (pgxp_mode >= PGXPMode::Memory)
       {
         if (add_value == 0)
diff --git a/src/core/pgxp.cpp b/src/core/pgxp.cpp
index f78b60668..7d1e1527d 100644
--- a/src/core/pgxp.cpp
+++ b/src/core/pgxp.cpp
@@ -920,12 +920,6 @@ void CPU_ADDI(u32 instr, u32 rtVal, u32 rsVal)
   CPU_reg[rt(instr)].value = rtVal;
 }
 
-void CPU_ADDIU(u32 instr, u32 rtVal, u32 rsVal)
-{
-  // Rt = Rs + Imm (signed) (unsafe?)
-  CPU_ADDI(instr, rtVal, rsVal);
-}
-
 void CPU_ANDI(u32 instr, u32 rtVal, u32 rsVal)
 {
   // Rt = Rs & Imm
@@ -1112,12 +1106,6 @@ void CPU_ADD(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal)
   CPU_reg[rd(instr)] = ret;
 }
 
-void CPU_ADDU(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal)
-{
-  // Rd = Rs + Rt (signed) (unsafe?)
-  CPU_ADD(instr, rdVal, rsVal, rtVal);
-}
-
 void CPU_SUB(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal)
 {
   // Rd = Rs - Rt (signed)
@@ -1156,12 +1144,6 @@ void CPU_SUB(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal)
   CPU_reg[rd(instr)] = ret;
 }
 
-void CPU_SUBU(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal)
-{
-  // Rd = Rs - Rt (signed) (unsafe?)
-  CPU_SUB(instr, rdVal, rsVal, rtVal);
-}
-
 void CPU_AND_(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal)
 {
   // Rd = Rs & Rt
diff --git a/src/core/pgxp.h b/src/core/pgxp.h
index 5bee366d6..7667fbb6e 100644
--- a/src/core/pgxp.h
+++ b/src/core/pgxp.h
@@ -56,7 +56,6 @@ void CPU_MOVE(u32 rd_and_rs, u32 rsVal);
 
 // Arithmetic with immediate value
 void CPU_ADDI(u32 instr, u32 rtVal, u32 rsVal);
-void CPU_ADDIU(u32 instr, u32 rtVal, u32 rsVal);
 void CPU_ANDI(u32 instr, u32 rtVal, u32 rsVal);
 void CPU_ORI(u32 instr, u32 rtVal, u32 rsVal);
 void CPU_XORI(u32 instr, u32 rtVal, u32 rsVal);
@@ -68,9 +67,7 @@ void CPU_LUI(u32 instr, u32 rtVal);
 
 // Register Arithmetic
 void CPU_ADD(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal);
-void CPU_ADDU(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal);
 void CPU_SUB(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal);
-void CPU_SUBU(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal);
 void CPU_AND_(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal);
 void CPU_OR_(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal);
 void CPU_XOR_(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal);