diff --git a/renderdoc/driver/metal/official/metal-cpp.h b/renderdoc/driver/metal/official/metal-cpp.h
index a7eb9a76d..2edab8d39 100644
--- a/renderdoc/driver/metal/official/metal-cpp.h
+++ b/renderdoc/driver/metal/official/metal-cpp.h
@@ -496,8 +496,8 @@ namespace NS
 {
 using TimeInterval = double;
 
-using Integer = std::intptr_t;
-using UInteger = std::uintptr_t;
+using Integer = std::int64_t;
+using UInteger = std::uint64_t;
 
 const Integer  IntegerMax = INTPTR_MAX;
 const Integer  IntegerMin = INTPTR_MIN;