diff --git a/bind_add_dkim_zone_master.sh b/bind_add_dkim_zone_master.sh
index fc81386..b45b3f0 100755
--- a/bind_add_dkim_zone_master.sh
+++ b/bind_add_dkim_zone_master.sh
@@ -10,10 +10,10 @@
 # -    error:
 # -      10:    Missing option for zone definition
 # -      15:    DKIM domain not supported by this nameserver
-# -      20:    Add Zone definition failed
+# -      20:    Adding Zone definition failed
 # -      21:    Adding Zonefile failed
 # -      22:    Change owner for newly created zonefile failed
-# -      23:    Reload bind configuration
+# -      23:    Reload bind configuration failed
 # -      99:    Fatal error
 # - 
 # - Example:
diff --git a/bind_add_dkim_zone_slave.sh b/bind_add_dkim_zone_slave.sh
index de218a7..f537a71 100755
--- a/bind_add_dkim_zone_slave.sh
+++ b/bind_add_dkim_zone_slave.sh
@@ -8,7 +8,7 @@
 # -       1:    Slave zone already exists
 # - 
 # -    error:
-# -      15:    DNS master Server not present
+# -      15:    Variable for DNS master Server not present
 # -      21:    Adding Zone failed
 #-       99:    Fatal error
 # - 
@@ -66,7 +66,7 @@ usage() {
        1:    Slave zone already exists
 
    error:
-      15:    DNS master Server not present
+      15:    Variable for DNS master Server (DKIM_DNS_MASTER) not present
       21:    Adding Zone failed
       23:    Reload bind configuration failed
       99:    Fatal error