diff --git a/Source/Project64-core/N64System/Mips/R4300iInstruction.cpp b/Source/Project64-core/N64System/Mips/R4300iInstruction.cpp
index 12fdda7b6..c12364f8b 100644
--- a/Source/Project64-core/N64System/Mips/R4300iInstruction.cpp
+++ b/Source/Project64-core/N64System/Mips/R4300iInstruction.cpp
@@ -199,7 +199,7 @@ void R4300iInstruction::ReadsGPR(uint32_t & Reg1, uint32_t & Reg2) const
     Reg2 = 0;
 }
 
-uint32_t R4300iInstruction::WritesGPR(void) const
+int32_t R4300iInstruction::WritesGPR(void) const
 {
     uint32_t op = m_Instruction.op;
     if (op == R4300i_SPECIAL)
@@ -226,7 +226,7 @@ uint32_t R4300iInstruction::WritesGPR(void) const
     {
         return 31; // RA
     }
-    return (uint32_t)-1;
+    return -1;
 }
 
 bool R4300iInstruction::ReadsHI() const
diff --git a/Source/Project64-core/N64System/Mips/R4300iInstruction.h b/Source/Project64-core/N64System/Mips/R4300iInstruction.h
index 90f3f160e..618b8bdc8 100644
--- a/Source/Project64-core/N64System/Mips/R4300iInstruction.h
+++ b/Source/Project64-core/N64System/Mips/R4300iInstruction.h
@@ -18,7 +18,7 @@ public:
     bool HasDelaySlot(void) const;
     bool DelaySlotEffectsCompare(uint32_t DelayInstruction) const;
     void ReadsGPR(uint32_t & Reg1, uint32_t & Reg2) const;
-    uint32_t WritesGPR(void) const;
+    int32_t WritesGPR(void) const;
     bool ReadsHI() const;
     bool ReadsLO() const;
     bool WritesHI() const;
diff --git a/Source/Project64-core/N64System/Recompiler/x86/x86RecompilerOps.cpp b/Source/Project64-core/N64System/Recompiler/x86/x86RecompilerOps.cpp
index 9422f6747..5daef0bde 100644
--- a/Source/Project64-core/N64System/Recompiler/x86/x86RecompilerOps.cpp
+++ b/Source/Project64-core/N64System/Recompiler/x86/x86RecompilerOps.cpp
@@ -9771,7 +9771,7 @@ asmjit::x86::Gp CX86RecompilerOps::BaseOffsetAddress(bool UseBaseRegister)
 
 void CX86RecompilerOps::CompileLoadMemoryValue(asmjit::x86::Gp & AddressReg, const asmjit::x86::Gp & ValueReg, const asmjit::x86::Gp & ValueRegHi, uint8_t ValueSize, bool SignExtend)
 {
-    if (ValueSize == 32 && m_Instruction.WritesGPR() != 0)
+    if (ValueSize == 32 && m_Instruction.WritesGPR() > 0)
     {
         m_RegWorkingSet.ProtectGPR(m_Opcode.base);
         m_RegWorkingSet.Map_GPR_32bit(m_Opcode.rt, true, m_Opcode.rt != m_Opcode.base ? -1 : m_Opcode.base);