diff --git a/docs/source/guides/admin-guides/manage_clusters/common/deployment/acc_initrd_rootimg_gen.rst b/docs/source/guides/admin-guides/manage_clusters/common/deployment/acc_initrd_rootimg_gen.rst
index 635905e82..f0056b03a 100644
--- a/docs/source/guides/admin-guides/manage_clusters/common/deployment/acc_initrd_rootimg_gen.rst
+++ b/docs/source/guides/admin-guides/manage_clusters/common/deployment/acc_initrd_rootimg_gen.rst
@@ -20,7 +20,7 @@ The parallel compression tool ``pigz`` can be enabled by installing ``pigz`` pac
 
   Refer to the http://fedoraproject.org/wiki/EPEL for more details on EPEL
 
-  1) Enabling the ``pigz`` in ``genimage`` (only supported in RHELS6 or above)
+  1) Enabling the ``pigz`` in ``genimage`` (only supported in RHEL 7 or above)
 
      ``pigz`` should be installed in the diskless rootimg. Download ``pigz`` package from https://dl.fedoraproject.org/pub/epel/ , then customize the diskless osimage to install ``pigz`` as the additional packages, see :doc:`Install Additional Other Packages</guides/admin-guides/manage_clusters/ppc64le/diskless/customize_image/additional_pkg>` for more details.