diff --git a/fhem/FHEM/10_RESIDENTS.pm b/fhem/FHEM/10_RESIDENTS.pm
index 4eb22749b..7371be72b 100644
--- a/fhem/FHEM/10_RESIDENTS.pm
+++ b/fhem/FHEM/10_RESIDENTS.pm
@@ -282,8 +282,10 @@ sub RESIDENTS_Set($@) {
 
     # depending on current FHEMWEB instance's allowedCommands,
     # restrict set commands if there is "set-user" in it
-    my $adminMode = 1;
-    my $FWallowedCommands = AttrVal( $FW_wname, "allowedCommands", 0 );
+    my $adminMode         = 1;
+    my $FWallowedCommands = 0;
+    $FWallowedCommands = AttrVal( $FW_wname, "allowedCommands", 0 )
+      if ( defined($FW_wname) );
     if ( $FWallowedCommands && $FWallowedCommands =~ m/\bset-user\b/ ) {
         $adminMode = 0;
         return "Forbidden command: set " . $a[1]
diff --git a/fhem/FHEM/20_GUEST.pm b/fhem/FHEM/20_GUEST.pm
index 74f1905fb..04ccb9ff7 100644
--- a/fhem/FHEM/20_GUEST.pm
+++ b/fhem/FHEM/20_GUEST.pm
@@ -287,8 +287,10 @@ sub GUEST_Set($@) {
 
     # depending on current FHEMWEB instance's allowedCommands,
     # restrict set commands if there is "set-user" in it
-    my $adminMode = 1;
-    my $FWallowedCommands = AttrVal( $FW_wname, "allowedCommands", 0 );
+    my $adminMode         = 1;
+    my $FWallowedCommands = 0;
+    $FWallowedCommands = AttrVal( $FW_wname, "allowedCommands", 0 )
+      if ( defined($FW_wname) );
     if ( $FWallowedCommands && $FWallowedCommands =~ m/\bset-user\b/ ) {
         $adminMode = 0;
         return "Forbidden command: set " . $a[1]
diff --git a/fhem/FHEM/20_ROOMMATE.pm b/fhem/FHEM/20_ROOMMATE.pm
index 227679fa3..405da5b90 100644
--- a/fhem/FHEM/20_ROOMMATE.pm
+++ b/fhem/FHEM/20_ROOMMATE.pm
@@ -292,8 +292,10 @@ sub ROOMMATE_Set($@) {
 
     # depending on current FHEMWEB instance's allowedCommands,
     # restrict set commands if there is "set-user" in it
-    my $adminMode = 1;
-    my $FWallowedCommands = AttrVal( $FW_wname, "allowedCommands", 0 );
+    my $adminMode         = 1;
+    my $FWallowedCommands = 0;
+    $FWallowedCommands = AttrVal( $FW_wname, "allowedCommands", 0 )
+      if ( defined($FW_wname) );
     if ( $FWallowedCommands && $FWallowedCommands =~ m/\bset-user\b/ ) {
         $adminMode = 0;
         return "Forbidden command: set " . $a[1]
diff --git a/fhem/FHEM/70_ENIGMA2.pm b/fhem/FHEM/70_ENIGMA2.pm
index 88452a919..e6b172cac 100644
--- a/fhem/FHEM/70_ENIGMA2.pm
+++ b/fhem/FHEM/70_ENIGMA2.pm
@@ -212,8 +212,10 @@ sub ENIGMA2_Set($@) {
 
     # depending on current FHEMWEB instance's allowedCommands,
     # restrict set commands if there is "set-user" in it
-    my $adminMode = 1;
-    my $FWallowedCommands = AttrVal( $FW_wname, "allowedCommands", 0 );
+    my $adminMode         = 1;
+    my $FWallowedCommands = 0;
+    $FWallowedCommands = AttrVal( $FW_wname, "allowedCommands", 0 )
+      if ( defined($FW_wname) );
     if ( $FWallowedCommands && $FWallowedCommands =~ m/\bset-user\b/ ) {
         $adminMode = 0;
         return "Forbidden command: set " . $a[1]
diff --git a/fhem/FHEM/70_ONKYO_AVR.pm b/fhem/FHEM/70_ONKYO_AVR.pm
index fcbc0f0ba..70ab4e1be 100755
--- a/fhem/FHEM/70_ONKYO_AVR.pm
+++ b/fhem/FHEM/70_ONKYO_AVR.pm
@@ -609,8 +609,10 @@ sub ONKYO_AVR_Set($@) {
 
     # depending on current FHEMWEB instance's allowedCommands,
     # restrict set commands if there is "set-user" in it
-    my $adminMode = 1;
-    my $FWallowedCommands = AttrVal( $FW_wname, "allowedCommands", 0 );
+    my $adminMode         = 1;
+    my $FWallowedCommands = 0;
+    $FWallowedCommands = AttrVal( $FW_wname, "allowedCommands", 0 )
+      if ( defined($FW_wname) );
     if ( $FWallowedCommands && $FWallowedCommands =~ m/\bset-user\b/ ) {
         $adminMode = 0;
         return "Forbidden command: set " . $a[1]
diff --git a/fhem/FHEM/70_PHTV.pm b/fhem/FHEM/70_PHTV.pm
index df9a49a64..99bf916b5 100644
--- a/fhem/FHEM/70_PHTV.pm
+++ b/fhem/FHEM/70_PHTV.pm
@@ -283,8 +283,10 @@ sub PHTV_Set($@) {
 
     # depending on current FHEMWEB instance's allowedCommands,
     # restrict set commands if there is "set-user" in it
-    my $adminMode = 1;
-    my $FWallowedCommands = AttrVal( $FW_wname, "allowedCommands", 0 );
+    my $adminMode         = 1;
+    my $FWallowedCommands = 0;
+    $FWallowedCommands = AttrVal( $FW_wname, "allowedCommands", 0 )
+      if ( defined($FW_wname) );
     if ( $FWallowedCommands && $FWallowedCommands =~ m/\bset-user\b/ ) {
         $adminMode = 0;
         return "Forbidden command: set " . $a[1]