diff --git a/doc/QuickStart.md b/doc/QuickStart.md
index 4a6fef9f..8a1e5d56 100644
--- a/doc/QuickStart.md
+++ b/doc/QuickStart.md
@@ -30,7 +30,6 @@ ORCA_DIR=$(orca sdk-path)
 wasmFlags=(--target=wasm32 \
   -mbulk-memory \
   -g -O2 \
-  -D__ORCA__ \
   -Wl,--no-entry \
   -Wl,--export-dynamic \
   --sysroot "$ORCA_DIR"/orca-libc \