diff --git a/doc/sources/building-android-binary.rst b/doc/sources/building-android-binary.rst
index dd222821..3b644dba 100644
--- a/doc/sources/building-android-binary.rst
+++ b/doc/sources/building-android-binary.rst
@@ -22,7 +22,7 @@ unpacked:
 .. code-block:: text
 
     $ build/tools/make_standalone_toolchain.py \
-      --arch arm --api 16 --stl gnustl
+      --arch arm --api 16 --stl gnustl \
       --install-dir $ANDROID_HOME/toolchain
 
 The API level (``--api``) is not important here because we don't use