diff --git a/tools/osbuilder/rootfs-builder/rootfs.sh b/tools/osbuilder/rootfs-builder/rootfs.sh
index 6e6ea3bdf2..6ac1625756 100755
--- a/tools/osbuilder/rootfs-builder/rootfs.sh
+++ b/tools/osbuilder/rootfs-builder/rootfs.sh
@@ -560,7 +560,7 @@ EOT
 	AGENT_DEST="${AGENT_DIR}/${AGENT_BIN}"
 
 	if [ -z "${AGENT_SOURCE_BIN}" ] ; then
-		[ "$ARCH" == "ppc64le" ] && ([ "$LIBC" == "gnu" ] || (LIBC=gnu && echo "WARNING: LIBC type for ppc64le should be gnu"))
+		[ "$ARCH" == "ppc64le" ] && { LIBC=gnu; echo "WARNING: Forcing LIBC=gnu for ppc64le because musl toolchain is not supported on ppc64le"; }
 		bash ${script_dir}/../../../ci/install_musl.sh
 		# rust agent needs ${arch}-unknown-linux-${LIBC}
 		rustup show | grep linux-${LIBC} > /dev/null || bash ${script_dir}/../../../ci/install_rust.sh