diff --git a/README.md b/README.md
index 30794e2..42f1614 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ After login (ssh) proceed with these steps:
 4. `git clone https://repos.ctdo.de/interfisch/bananenkeyboard/`
 5. `pip3 install pyserial pygame`
 6. `sudo sh -c 'echo "\n[all]\nenable_uart=1\n" >>/boot/config.txt'`
-7. `sudo sh -c 'sed 's/^dtoverlay=vc4-kms-v3d/dtoverlay=vc4-fkms-v3d/' -i /boot/config.txt`
+7. `sudo sh -c 'sed "s/^dtoverlay=vc4-kms-v3d/dtoverlay=vc4-fkms-v3d/" -i /boot/config.txt'`
 8. `sudo mkdir /etc/systemd/system/systemd-udevd.service.d`
 9. `sudo sh -c 'echo "[Service]\nPrivateMounts=no" >/etc/systemd/system/systemd-udevd.service.d/00-my-custom-mountflags.conf'`
 10. `chmod u+x ~/bananenkeyboard/Pi/s.py`