diff --git a/spl-modules.spec.in b/spl-modules.spec.in
index ddeb2609d7..e02d6c2556 100644
--- a/spl-modules.spec.in
+++ b/spl-modules.spec.in
@@ -233,17 +233,6 @@ rm -rf $RPM_BUILD_ROOT
 %{_prefix}/src/*
 
 %post
-# The /sbin/genhostid utility writes a random value to the /etc/hostid
-# file, which means that using it here will break upgrades on systems
-# that already have spl installed.
-if [ ! -f /etc/hostid ]; then
-	HOSTID=$(hostid)
-	AA=$(echo $HOSTID | cut -b 1,2)
-	BB=$(echo $HOSTID | cut -b 3,4)
-	CC=$(echo $HOSTID | cut -b 5,6)
-	DD=$(echo $HOSTID | cut -b 7,8)
-	"$(which printf)" "\x$DD\x$CC\x$BB\x$AA" >"/etc/hostid"
-fi
 if [ -f /boot/System.map-%{kver} ]; then
 	depmod -ae -F /boot/System.map-%{kver} %{kver} || exit 0
 else