diff --git a/chapter08/udev.xml b/chapter08/udev.xml
index 8883b624b..1be726094 100644
--- a/chapter08/udev.xml
+++ b/chapter08/udev.xml
@@ -59,7 +59,7 @@
Adjust the hardcoded paths to network configuration files for the
standalone udev installation:
- sed -e '/NETWORK_DIRS/s/systemd/udev/'
+ sed -e '/NETWORK_DIRS/s/systemd/udev/' \
-i src/libsystemd/sd-network/network-util.h
Prepare Udev for compilation: