diff --git a/osx/make-app.sh b/osx/make-app.sh
index aa8c4b18df..019e0b94a9 100755
--- a/osx/make-app.sh
+++ b/osx/make-app.sh
@@ -116,14 +116,16 @@ echo "py2app forgets AVFoundation, do it by hand:"
 rsync -rplogt ${JHBUILD_PREFIX}/lib/python${PYTHON_MAJOR_VERSION}.${PYTHON_MINOR_VERSION}/site-packages/AVFoundation ./dist/xpra.app/Contents/Resources/lib/python${PYTHON_MAJOR_VERSION}.${PYTHON_MINOR_VERSION}/
 echo "fixup pkg_resources.py2_warn and gi: force include the whole packages"
 if [ "${PYTHON_MAJOR_VERSION}" == "3" ]; then
-	MODULES="pkg_resources gi"
+	MODULES="pkg_resources gi cffi"
 else
-	MODULES="pkg_resources"
+	MODULES="pkg_resources cffi"
 fi
 for m in $MODULES; do
 	mpath=`python3 -c "import os;import $m;print(os.path.dirname($m.__file__))"`
 	cp -r $mpath ./dist/xpra.app/Contents/Resources/lib/python3.${PYTHON_MINOR_VERSION}/
 done
+mpath=`python3 -c "import _cffi_backend;print(_cffi_backend.__file__)"`
+cp $mpath ./dist/xpra.app/Contents/Resources/lib/python3.${PYTHON_MINOR_VERSION}/lib-dynload/
 echo "OK"
 popd