--- innotop.orig	2014-06-17 08:31:31.000000000 -0400
+++ innotop	2014-06-17 08:32:19.000000000 -0400
@@ -470,7 +470,7 @@
    # too many locks to print, the output might be truncated)
 
    my $time_text;
-   if ( $mysqlversion =~ /^5\.6/ ) {
+   if ( defined $mysqlversion && $mysqlversion =~ /^5\.6/ ) {
       ( $time_text ) = $fulltext =~ m/^([0-9-]* [0-9:]*) [0-9a-f]* INNODB MONITOR OUTPUT/m;
       $innodb_data{'ts'} = [ parse_innodb_timestamp_56( $time_text ) ];
    } else {