diff --git a/plugins/postgresql/postgresql_transactions b/plugins/postgresql/postgresql_transactions
index c127e633..47db7b64 100755
--- a/plugins/postgresql/postgresql_transactions
+++ b/plugins/postgresql/postgresql_transactions
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 #
 # Plugin to monitor PostgreSQL Commits and Rollbacks in Transactions
 #
@@ -42,4 +42,4 @@ if [ "$1" = "config" ]; then
    echo 'rollbacks.info Number of transaction rollbacks per second.'
    exit 0
 fi
-psql -h ${dbserver} -U ${dbuser} -tc "SELECT 'commits.value '||SUM(xact_commit)::TEXT||E'\nrollbacks.value '||SUM(xact_rollback)::TEXT FROM pg_stat_database;" --no-align
+psql -h "$dbserver" -U "$dbuser" -tc "SELECT 'commits.value '||SUM(xact_commit)::TEXT||E'\\nrollbacks.value '||SUM(xact_rollback)::TEXT FROM pg_stat_database;" --no-align