diff --git a/modules/olm-pruning-index-image.adoc b/modules/olm-pruning-index-image.adoc
index deab009d7deb..8457458112ea 100644
--- a/modules/olm-pruning-index-image.adoc
+++ b/modules/olm-pruning-index-image.adoc
@@ -123,10 +123,12 @@ $ opm index prune \
     -f {index-image-pullspec} \// <1>
     -p {package1},{package2},{package3} \// <2>
     -t <target_registry>:<port>/<namespace>/{index-image} <3>
+    -i registry.redhat.io/openshift4/ose-operator-registry/{index-image} <4>
 ----
 <1> Index to prune.
 <2> Comma-separated list of packages to keep.
 <3> Custom tag for new index image being built.
+<4> For IBM Power Systems and IBM Z images only, you must add the `-i` entry to the command.
 
 . Run the following command to push the new index image to your target registry:
 +