diff --git a/Changelog b/Changelog
index 29d13bb3..e2b0098e 100644
--- a/Changelog
+++ b/Changelog
@@ -6,6 +6,7 @@ v3.0.7
  * Feature      PT-633 : Added --mysql-only option to pt-stalk for RDS
  * Fixed bug    PT-1256: pt-table-sync does not use the character set for the table it is synchronizing
  * Fixed bug    PT-1455: pt-osc is stuck when the table that is being altered is filtered out in the slave
+ * Fixed bug    PT-1485: pt-mysql-summary has broken Security section in versions bigger then 5.6
  * Fixed bug   PMM-1905: Explain fails if encounters negative "ntoreturn"
 
 v3.0.6 released 2017-12-20
diff --git a/bin/pt-mysql-summary b/bin/pt-mysql-summary
index 59e55716..e0f1cf1f 100755
--- a/bin/pt-mysql-summary
+++ b/bin/pt-mysql-summary
@@ -927,6 +927,9 @@ collect_mysql_processlist () {
 
 collect_mysql_users () {
    $CMD_MYSQL $EXT_ARGV -ss -e 'SELECT COUNT(*), SUM(user=""), SUM(password=""), SUM(password NOT LIKE "*%") FROM mysql.user' 2>/dev/null
+   if [ "$?" -ne 0 ]; then
+       $CMD_MYSQL $EXT_ARGV -ss -e 'SELECT COUNT(*), SUM(user=""), SUM(authentication_string=""), SUM(authentication_string NOT LIKE "*%") FROM mysql.user' 2>/dev/null
+   fi
 }
 
 collect_mysql_show_slave_hosts () {
@@ -2195,7 +2198,7 @@ report_jemalloc_enabled() {
   local JEMALLOC_LOCATION=''
 
   for PID in $(pidof mysqld); do
-     grep -qc jemalloc /proc/${PID}/environ || ldd $(which mysqld) | grep -qc jemalloc
+     grep -qc jemalloc /proc/${PID}/environ || ldd $(which mysqld) 2>/dev/null | grep -qc jemalloc
      JEMALLOC_STATUS=$?
      if [ $JEMALLOC_STATUS = 1 ]; then
        echo "jemalloc is not enabled in MySQL config for process with ID ${PID}" 
diff --git a/t/pt-mysql-summary/pt-mysql-summary.t b/t/pt-mysql-summary/pt-mysql-summary.t
index f5e0da2d..3ea61c8a 100644
--- a/t/pt-mysql-summary/pt-mysql-summary.t
+++ b/t/pt-mysql-summary/pt-mysql-summary.t
@@ -66,6 +66,11 @@ like(
    "InnoDB section present"
 );
 
+like(
+   $out,
+   qr/Users \| 2/,
+   "Security works"
+);
 
 # --read-samples
 for my $i (2..7) {