diff --git a/chapter08/systemd.xml b/chapter08/systemd.xml
index fff3f2280..d25b608cf 100644
--- a/chapter08/systemd.xml
+++ b/chapter08/systemd.xml
@@ -48,10 +48,10 @@
  <screen><userinput remap="pre">sed -i -e 's/GROUP="render"/GROUP="video"/' \
        -e 's/GROUP="sgx", //' rules.d/50-udev-default.rules.in</userinput></screen>
 
- <para>Next, fix compatibility with linux-6.9 and later:</para>
+ <para>Next, fix compatibility with API headers from linux-6.9 and later:</para>
 
  <screen><userinput remap="pre">sed -i '/DEVMEM_MAGIC 0/{n;n;a \
-/* cb12fd8e0dabb9a1c8aef55a6a41e2c255fcdf4b (6.8) */
+/* cb12fd8e0dabb9a1c8aef55a6a41e2c255fcdf4b (6.8) */ \
 #ifndef PID_FS_MAGIC \
 #define PID_FS_MAGIC 0x50494446 \
 #endif
diff --git a/chapter08/udev.xml b/chapter08/udev.xml
index 6754a36f6..a69d42728 100644
--- a/chapter08/udev.xml
+++ b/chapter08/udev.xml
@@ -55,7 +55,7 @@
 
  <screen><userinput remap="pre">sed '/systemd-sysctl/s/^/#/' -i rules.d/99-systemd.rules.in</userinput></screen>
 
- <para>Next, fix compatibility with linux-6.9 and later:</para>
+ <para>Next, fix compatibility with API headers from linux-6.9 and later:</para>
 
  <screen><userinput remap="pre">sed -i '/DEVMEM_MAGIC 0/{n;n;a \
 /* cb12fd8e0dabb9a1c8aef55a6a41e2c255fcdf4b (6.8) */ \