diff --git a/render-wasm/_build_env b/render-wasm/_build_env
index 10f2e79afd..d0e47b7de1 100644
--- a/render-wasm/_build_env
+++ b/render-wasm/_build_env
@@ -27,7 +27,7 @@ _CARGO_PARAMS="--target=wasm32-unknown-emscripten";
 
 if [ "$_BUILD_MODE" = "release" ]; then
     _CARGO_PARAMS="--release $_CARGO_PARAMS"
-    EMCC_CFLAGS="-Os $EMCC_FLAGS"
+    EMCC_CFLAGS="-Os $EMCC_CFLAGS"
 else
     # TODO: Extra parameters that could be good to look into:
     #        -gseparate-dwarf