diff --git a/cfg/emscripten.cfg b/cfg/emscripten.cfg
new file mode 100644
index 000000000..4f345d3ff
--- /dev/null
+++ b/cfg/emscripten.cfg
@@ -0,0 +1,5 @@
+<?xml version="1.0"?>
+<def format="2">
+  <define name="EM_ASM(...)" value=""/>
+  <define name="EM_JS(...)" value=""/>
+</def>