diff --git a/plugins/emc/emc_vnx_block_lun_perfdata b/plugins/emc/emc_vnx_block_lun_perfdata
index 780b717e..e8b0b430 100755
--- a/plugins/emc/emc_vnx_block_lun_perfdata
+++ b/plugins/emc/emc_vnx_block_lun_perfdata
@@ -145,9 +145,9 @@ export LANG=C
 
 . "$MUNIN_LIBDIR/plugins/plugin.sh"
 
-cs_addr=""
-username=""
-blockpw=""
+: ${cs_addr:=""}
+: ${username:=""}
+: ${blockpw:=""}
 
 TARGET=$(echo "${0##*/}" | cut -d _ -f 6)
 
diff --git a/plugins/emc/emc_vnx_file_ b/plugins/emc/emc_vnx_file_
index d1578f19..178e23e2 100755
--- a/plugins/emc/emc_vnx_file_
+++ b/plugins/emc/emc_vnx_file_
@@ -135,8 +135,10 @@ export LANG=C
 . "$MUNIN_LIBDIR/plugins/plugin.sh"
 
 nas_server_ok=""
-cs_addr=""
-username=""
+: ${cs_addr:=""}
+: ${username:=""}
+: ${nas_servers:="server_2 server_3"}
+
 # Prints "10" on stdout if found Primary Online control station. "11" - for Secondary Online control station. 
 ssh_check_cmd() {
 	ssh -q "$username@$1" '/nasmcd/sbin/getreason | grep -w "slot_$(/nasmcd/sbin/t2slot)" | cut -d- -f1'
@@ -190,7 +192,6 @@ elif [ "$STATSTYPE" = "emc_vnx_file_basicdm_stats" ]; then STATSTYPE=BASICDM;
 else echo "Do not know what to do. Name the plugin as 'emc_vnx_file_nfs_stats_<HOSTNAME>' or 'emc_vnx_file_basicdm_stats_<HOSTNAME>'" >&2; exit 1; fi
 
 TARGET=$(echo "${0##*/}" | cut -d _ -f 6)
-: ${nas_servers:="server_2 server_3"}
 
 check_conf 1>&2 || exit 1