diff --git a/fhem/fhem.pl b/fhem/fhem.pl
index a1f351b1e..e8d7bfc1f 100755
--- a/fhem/fhem.pl
+++ b/fhem/fhem.pl
@@ -1492,11 +1492,11 @@ ReplaceSetMagic(@)       # Forum #38276
   my $a = join(" ", @_);
 
   $a =~ s/\[([a-z0-9._]+):([A-z0-9._]+)\]/{
-    my $x = ReadingsVal($1,$2,""); $x eq "" ? "$1:$2" : $x
+    my $x = ReadingsVal($1,$2,""); $x eq "" ? "$1:$2" : "[$x]"
   }/egi;
 
   $a =~ s/{([^}]+)}/{
-    my $x = eval $1; $@ ? $1 : $x
+    my $x = eval $1; $@ ? $1 : "{$x}"
   }/eg;
 
   return split(" ", $a);