diff --git a/sway/displays.pl b/sway/displays.pl
index 1611b46..ffb5ac3 100755
--- a/sway/displays.pl
+++ b/sway/displays.pl
@@ -414,6 +414,7 @@ foreach my $out (keys %$on) {
         {
             $cmd .= " mode $on->{$out}->{width}x" .
                 "$on->{$out}->{height}" .
+                (defined($on->{$out}->{refresh}) ? '@'.$on->{$out}->{refresh}.'Hz' : '');
         }
         if (defined $on->{$out}->{bg} &&
             -f $on->{$out}->{bg})