diff --git a/CMakeLists.txt b/CMakeLists.txt
index f6a9173b..c5350d52 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,7 @@ if(EMSCRIPTEN)
     "-s USE_GLFW=3 "
     "-s USE_ZLIB=1 "
     "-s ALLOW_MEMORY_GROWTH=1 "
+    "-s 'EXTRA_EXPORTED_RUNTIME_METHODS=[\"getValue\", \"setValue\"]' "
     "-s WASM=1"
   )
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LOVR_EMSCRIPTEN_FLAGS}")