diff --git a/dist.sh b/dist.sh
index 23bb032..cc0d3ea 100755
--- a/dist.sh
+++ b/dist.sh
@@ -25,7 +25,7 @@ function check_rhl {
 }
 
 function check_rhel {
-    egrep -q "(Enterprise|Advanced|CentOS)" $RELEASEFILE && echo $DISTNUM
+    grep -Eq "(Enterprise|Advanced|CentOS)" $RELEASEFILE && echo $DISTNUM
 }
 
 function check_fedora {