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-rwxr-xr-xplugins-scripts/check_log.sh2
1 files changed, 1 insertions, 1 deletions
diff --git a/plugins-scripts/check_log.sh b/plugins-scripts/check_log.sh
index d71f420e..fdb57416 100755
--- a/plugins-scripts/check_log.sh
+++ b/plugins-scripts/check_log.sh
@@ -212,7 +212,7 @@ elif [ ! -r "$logfile" ] ; then
exit "$STATE_UNKNOWN"
fi
# If no oldlog was given this can not work properly, abort then
-if [ ! -v oldlog ]; then
+if [ -z "$oldlog" ]; then
echo "Oldlog parameter is needed"
exit $STATE_UNKNOWN
fi