diff --git a/lib/Mojo/Server/Prefork.pm b/lib/Mojo/Server/Prefork.pm
index 9935d9819b..35a649125a 100644
--- a/lib/Mojo/Server/Prefork.pm
+++ b/lib/Mojo/Server/Prefork.pm
@@ -181,7 +181,7 @@ sub _wait {
   while ($chunk =~ /(\d+):(\d)\n/g) {
     next unless my $w = $self->{pool}{$1};
     @$w{qw(healthy time)} = (1, $time) and $self->emit(heartbeat => $1);
-    if($2) {
+    if ($2) {
       $w->{graceful} ||= $time;
       $w->{quit}++;
     }