diff --git a/robot-systest/lib/openstack_lib.resource b/robot-systest/lib/openstack_lib.resource
index b1c0875..64be1b4 100644
--- a/robot-systest/lib/openstack_lib.resource
+++ b/robot-systest/lib/openstack_lib.resource
@@ -99,6 +99,7 @@
     [Arguments]   ${volume_match}   ${index}
     Should Not Be Empty   ${volume_match}   ${index}
     ${bootable}=   Check If Volume Bootable   ${volume_match}[${index}]
+    ${bootable}=   Convert To Lowercase   ${bootable}
     IF   '${bootable}'=='true'
         Set Suite Variable   ${ROOT_VOL_ID}   ${volume_match}[${index}]
         IF   not ${index}