diff --git a/diskimage_builder/elements/yum/README.rst b/diskimage_builder/elements/yum/README.rst
index 11eaa5eb..6c471c89 100644
--- a/diskimage_builder/elements/yum/README.rst
+++ b/diskimage_builder/elements/yum/README.rst
@@ -21,8 +21,9 @@ avoid a filename collision.
 Environment Variables for Module Selection during Image Creation
 ----------------------------------------------------------------
 The following environment variable is used to select module streams to be
-enabled during an image build on RHEL8.  Any existing stream for the given
-module is first disabled prior to enabling the specified stream.
+enabled during an image build on Yum/DNF based distributions. Any existing
+stream for the given module is first disabled prior to enabling
+the specified stream.
 
 #### DIB\_DNF\_MODULE\_STREAMS
 This is a space-separated list of module streams to enable prior to any
@@ -30,7 +31,7 @@ RPMs being installed.
 
 Image Build Module Selection Example
 ------------------------------------
-When using Train on RHEL8.2, one must select the appropriate virt and
-container-tools module streams:
+When using Train release on RHEL/CentOS/Fedora, one must select the appropriate
+virt and container-tools module streams:
 
 DIB_DNF_MODULE_STREAMS='virt:8.2 container-tools:3.0'