diff --git a/Source/Core/Core/PowerPC/Jit64IL/IR_X86.cpp b/Source/Core/Core/PowerPC/Jit64IL/IR_X86.cpp
index a9107b1e81..97bb83fa9e 100644
--- a/Source/Core/Core/PowerPC/Jit64IL/IR_X86.cpp
+++ b/Source/Core/Core/PowerPC/Jit64IL/IR_X86.cpp
@@ -77,7 +77,7 @@ struct RegInfo final : private NonCopyable
   u32 numFSpills = 0;
   u32 exitNumber = 0;
 
-  RegInfo(JitIL* j, InstLoc f, u32 insts) : Jit(j), FirstI(f), IInfo(insts), lastUsed(insts) {}
+  RegInfo(JitIL* j, InstLoc f, size_t insts) : Jit(j), FirstI(f), IInfo(insts), lastUsed(insts) {}
 };
 
 static BitSet32 regsInUse(RegInfo& R)
diff --git a/Source/Core/Core/PowerPC/JitILCommon/IR.cpp b/Source/Core/Core/PowerPC/JitILCommon/IR.cpp
index 8eb732ea98..f7348ba34e 100644
--- a/Source/Core/Core/PowerPC/JitILCommon/IR.cpp
+++ b/Source/Core/Core/PowerPC/JitILCommon/IR.cpp
@@ -1769,15 +1769,15 @@ void IRBuilder::WriteToFile(u64 codeHash)
 
   const InstLoc lastCurReadPtr = curReadPtr;
   StartForwardPass();
-  const unsigned numInsts = getNumInsts();
-  for (unsigned int i = 0; i < numInsts; ++i)
+  const size_t numInsts = getNumInsts();
+  for (size_t i = 0; i < numInsts; ++i)
   {
     const InstLoc I = ReadForward();
     const unsigned opcode = getOpcode(*I);
     const bool thisUsed = IsMarkUsed(I) || alwaysUseds.find(opcode) != alwaysUseds.end();
 
     // Line number
-    fprintf(file, "%4u", i);
+    fprintf(file, "%4zu", i);
 
     if (!thisUsed)
       fprintf(file, "%*c", 32, ' ');
@@ -1795,7 +1795,7 @@ void IRBuilder::WriteToFile(u64 codeHash)
       if (isImm(*inst))
         fprintf(file, " 0x%08x", GetImmValue(inst));
       else
-        fprintf(file, " %10u", i - (unsigned int)(I - inst));
+        fprintf(file, " %10zu", i - static_cast<size_t>(I - inst));
     }
 
     // Op2
@@ -1806,7 +1806,7 @@ void IRBuilder::WriteToFile(u64 codeHash)
       if (isImm(*inst))
         fprintf(file, " 0x%08x", GetImmValue(inst));
       else
-        fprintf(file, " %10u", i - (unsigned int)(I - inst));
+        fprintf(file, " %10zu", i - static_cast<size_t>(I - inst));
     }
 
     if (extra8Regs.count(opcode))
diff --git a/Source/Core/Core/PowerPC/JitILCommon/IR.h b/Source/Core/Core/PowerPC/JitILCommon/IR.h
index d1e64d550c..1ad69cfcef 100644
--- a/Source/Core/Core/PowerPC/JitILCommon/IR.h
+++ b/Source/Core/Core/PowerPC/JitILCommon/IR.h
@@ -5,6 +5,7 @@
 #pragma once
 
 #include <array>
+#include <cstddef>
 #include <vector>
 
 #include "Common/CommonTypes.h"
@@ -379,7 +380,7 @@ public:
   InstLoc ReadForward() { return curReadPtr++; }
   InstLoc ReadBackward() { return --curReadPtr; }
   InstLoc getFirstInst() { return InstList.data(); }
-  unsigned int getNumInsts() { return (unsigned int)InstList.size(); }
+  size_t getNumInsts() const { return InstList.size(); }
   unsigned int GetImmValue(InstLoc I) const { return (u32)GetImmValue64(I); }
   u64 GetImmValue64(InstLoc I) const;
   void SetMarkUsed(InstLoc I);