diff --git a/util-linux.spec b/util-linux.spec
index ddc3446..b8d30df 100644
--- a/util-linux.spec
+++ b/util-linux.spec
@@ -524,7 +524,7 @@ bash ./util-linux-login_defs-check.sh
 #
 # WARNING: Never edit following line without doing all suggested in the echo below!
 UTIL_LINUX_KNOWN_SYSTEMD_DEPS='./login-utils/lslogins.c ./misc-utils/findmnt.c ./misc-utils/logger.c ./misc-utils/lsblk-properties.c ./misc-utils/uuidd.c '
-UTIL_LINUX_FOUND_SYSTEMD_DEPS=$(grep -rl 'HAVE_LIB\(SYSTEMD\|UDEV\)' . | grep '\.c$' | LC_ALL=C sort | tr '\n' ' ')
+UTIL_LINUX_FOUND_SYSTEMD_DEPS=$(find . -type f -name "*.c" -exec grep -l '#.*if.*HAVE_LIB\(SYSTEMD\|\UDEV\)' '{}' '+' | LC_ALL=C sort | tr '\n' ' ')
 if test "$UTIL_LINUX_KNOWN_SYSTEMD_DEPS" != "$UTIL_LINUX_FOUND_SYSTEMD_DEPS" ; then
 	echo "List of utilities depending on systemd have changed.
 Please check the new util-linux-systemd file list, file removal and update of Conflicts for safe update!