diff --git a/indra/newview/llgltfmateriallist.cpp b/indra/newview/llgltfmateriallist.cpp
index 1a059ca9fdf288c455d12bfc6ca45ad0548479ab..19cef5dffd6da0c3ba1efab0b7e2e256eba522c4 100644
--- a/indra/newview/llgltfmateriallist.cpp
+++ b/indra/newview/llgltfmateriallist.cpp
@@ -184,8 +184,8 @@ class LLGLTFMaterialOverrideDispatchHandler : public LLDispatchHandler
 
             if (message.has("sides") && message.has("gltf_json"))
             {
-                LLSD& sides = message.get("sides");
-                LLSD& gltf_json = message.get("gltf_json");
+                LLSD const& sides = message.get("sides");
+                LLSD const& gltf_json = message.get("gltf_json");
 
                 if (sides.isArray() && gltf_json.isArray() &&
                     sides.size() != 0 &&