diff --git a/check_postgres.pl b/check_postgres.pl
index d88cad7..6303cc2 100755
--- a/check_postgres.pl
+++ b/check_postgres.pl
@@ -2126,7 +2126,11 @@ sub msg_en {
     if ($opt{port}[0]){
         $pg_port = $opt{port}[0];
     }
-    my $psql_output = join(",", map /^([\w|-]+?)\|/, qx{$PSQL -A -l -t -p $pg_port });
+    my $pg_user = $opt{defaultuser};
+    if ($opt{dbuser}[0]){
+        $pg_user = $opt{dbuser}[0];
+    }
+    my $psql_output = join(",", map /^([\w|-]+?)\|/, qx{$PSQL -U $pg_user -A -l -t -p $pg_port });
     my $pg_db;
     # optionally exclude or include each db
     my @psql_output_array = split(/,/, $psql_output);