diff --git a/check_postgres.pl b/check_postgres.pl
index edb47e1..f386437 100755
--- a/check_postgres.pl
+++ b/check_postgres.pl
@@ -5223,7 +5223,7 @@ sub check_disk_space {
 
         ## Check log_directory: relative or absolute
         if (length $logdir) {
-            if ($logdir =~ /^\w/) { ## relative, check only if symlinked
+            if ($logdir =~ /^[\w\.]/) { ## relative, check only if symlinked
                 $logdir = "$datadir/$logdir";
                 if (-l $logdir) {
                     my $linkdir = readlink($logdir);