diff --git a/USAGE.md b/USAGE.md
index 28a077d..ed9e858 100644
--- a/USAGE.md
+++ b/USAGE.md
@@ -1,6 +1,6 @@
 # NAME
 
-    MySQLTuner 1.7.8 - MySQL High Performance Tuning Script
+    MySQLTuner 1.7.9 - MySQL High Performance Tuning Script
 
 # IMPORTANT USAGE GUIDELINES
 
diff --git a/mysqltuner.pl b/mysqltuner.pl
index 22ec64c..be2f5ba 100755
--- a/mysqltuner.pl
+++ b/mysqltuner.pl
@@ -1852,12 +1852,14 @@ sub get_replication_status {
       . (
         defined( $myvar{'rpl_semi_sync_master_enabled'} )
         ? $myvar{'rpl_semi_sync_master_enabled'}
-        : 'Not Activated' );
+        : 'Not Activated'
+      );
     infoprint "Semi synchronous replication Slave: "
       . (
         defined( $myvar{'rpl_semi_sync_slave_enabled'} )
         ? $myvar{'rpl_semi_sync_slave_enabled'}
-        : 'Not Activated' );
+        : 'Not Activated'
+      );
     if ( scalar( keys %myrepl ) == 0 and scalar( keys %myslaves ) == 0 ) {
         infoprint "This is a standalone server";
         return;
@@ -5904,8 +5906,11 @@ sub mysql_tables {
                 my $optimal_type = select_str_g( "Optimal_fieldtype",
                     "SELECT $_ FROM $dbname.$tbname PROCEDURE ANALYSE(100000)"
                 );
-
-                if ( $current_type ne $optimal_type ) {
+                if ( not defined($optimal_type) or $optimal_type eq '' ) {
+                    infoprint "      Current Fieldtype: $current_type";
+                    infoprint "      Optimal Fieldtype: Not available";
+                }
+                elsif ( $current_type ne $optimal_type ) {
                     infoprint "      Current Fieldtype: $current_type";
                     infoprint "      Optimal Fieldtype: $optimal_type";
                     badprint