diff --git a/ReactCommon/react/renderer/mapbuffer/MapBufferBuilder.cpp b/ReactCommon/react/renderer/mapbuffer/MapBufferBuilder.cpp
index eb1c155a1cd..5ebdf75e7f9 100644
--- a/ReactCommon/react/renderer/mapbuffer/MapBufferBuilder.cpp
+++ b/ReactCommon/react/renderer/mapbuffer/MapBufferBuilder.cpp
@@ -148,7 +148,7 @@ void MapBufferBuilder::putString(Key key, std::string const &value) {
   dynamicDataOffset_ += sizeOfDynamicData;
 }
 
-void MapBufferBuilder::putMapBuffer(Key key, MapBuffer &map) {
+void MapBufferBuilder::putMapBuffer(Key key, MapBuffer const &map) {
   int32_t mapBufferSize = map.getBufferSize();
 
   // format [lenght of buffer (int)] + [bytes of MapBuffer]
diff --git a/ReactCommon/react/renderer/mapbuffer/MapBufferBuilder.h b/ReactCommon/react/renderer/mapbuffer/MapBufferBuilder.h
index f7190f7fd38..5e30a7e1330 100644
--- a/ReactCommon/react/renderer/mapbuffer/MapBufferBuilder.h
+++ b/ReactCommon/react/renderer/mapbuffer/MapBufferBuilder.h
@@ -84,7 +84,7 @@ class MapBufferBuilder {
 
   void putString(Key key, std::string const &value);
 
-  void putMapBuffer(Key key, MapBuffer &map);
+  void putMapBuffer(Key key, MapBuffer const &map);
 
   // TODO T83483191: This should return MapBuffer!
   MapBuffer build();