diff --git a/renderdoc/driver/metal/metal_stringise.cpp b/renderdoc/driver/metal/metal_stringise.cpp
index 516fe9480..fd1f90033 100644
--- a/renderdoc/driver/metal/metal_stringise.cpp
+++ b/renderdoc/driver/metal/metal_stringise.cpp
@@ -1125,6 +1125,17 @@ rdcstr DoStringise(const MTL::CullMode &el)
   END_ENUM_STRINGISE();
 };
 
+template <>
+rdcstr DoStringise(const MTL::IndexType &el)
+{
+  BEGIN_ENUM_STRINGISE(MTL::IndexType)
+  {
+    MTL_STRINGISE_ENUM(IndexTypeUInt16);
+    MTL_STRINGISE_ENUM(IndexTypeUInt32);
+  }
+  END_ENUM_STRINGISE()
+}
+
 template <>
 rdcstr DoStringise(const MetalResourceType &el)
 {
diff --git a/renderdoc/driver/metal/metal_types.h b/renderdoc/driver/metal/metal_types.h
index 7f6b780b1..5876acbea 100644
--- a/renderdoc/driver/metal/metal_types.h
+++ b/renderdoc/driver/metal/metal_types.h
@@ -159,6 +159,7 @@ MTL_DECLARE_REFLECTION_TYPE(ArgumentBuffersTier);
 MTL_DECLARE_REFLECTION_TYPE(DepthClipMode);
 MTL_DECLARE_REFLECTION_TYPE(TriangleFillMode);
 MTL_DECLARE_REFLECTION_TYPE(CullMode);
+MTL_DECLARE_REFLECTION_TYPE(IndexType);
 
 template <>
 inline rdcliteral TypeName<NS::Range>()