diff --git a/sway/wallpaper.pl b/sway/wallpaper.pl
index 39953fe..f1c2efd 100755
--- a/sway/wallpaper.pl
+++ b/sway/wallpaper.pl
@@ -433,7 +433,7 @@ while (my $arg = shift(@ARGV)) {
 $wp->do_log("LOG_DEBUG", "Validating arguments");
 die "Invalid rotation delay: $delay" if (defined($delay) && $delay !~ m/^\d+$/);
 die "Invalid wallpaper path '$path'. Not a directory." if (defined($path) && !-d $path);
-die "Invalid verbosity level: '$verbose'\n" if (defined($verbose) && $verbose =~ m/^[1-8]$/);
+die "Invalid verbosity level: '$verbose'\n" if (defined($verbose) && $verbose !~ m/^[1-8]$/);
 
 $wp->do_log("LOG_DEBUG", "Configuring object");
 $wp->{targets}  = \@targets || undef;