diff --git a/src/core/hle/ipc_helpers.h b/src/core/hle/ipc_helpers.h
index 8176f0bbb6..2f2312761f 100644
--- a/src/core/hle/ipc_helpers.h
+++ b/src/core/hle/ipc_helpers.h
@@ -19,7 +19,7 @@ class RequestHelperBase {
 protected:
     Kernel::HLERequestContext* context;
     u32* cmdbuf;
-    ptrdiff_t index = 1;
+    std::size_t index = 1;
     Header header;
 
 public: