diff --git a/check b/check
index abfe353..d0c1696 100755
--- a/check
+++ b/check
@@ -239,7 +239,7 @@
 sollte...\n" | tee -a ${LOGS}/${2}.${LEVEL5}
 while read line
 do
-	grep -Hn -f ${CHECKERHOME}/warn_prop.list $line \
+	grep -EHn -f ${CHECKERHOME}/warn_prop.list $line \
 	>> ${LOGS}/${2}.${LEVEL5}
 done < ${LPCFILES}