diff --git a/cfg/emscripten.cfg b/cfg/emscripten.cfg
index 4f345d3ff..75f02f23f 100644
--- a/cfg/emscripten.cfg
+++ b/cfg/emscripten.cfg
@@ -2,4 +2,6 @@
 <def format="2">
   <define name="EM_ASM(...)" value=""/>
   <define name="EM_JS(...)" value=""/>
+  <define name="MAIN_THREAD_EM_ASM(...)" value=""/>
+  <define name="EMSCRIPTEN_BINDINGS(...)" value=""/>
 </def>