diff --git a/inc/mo_dynamic.php b/inc/mo_dynamic.php
index a9bdfb7..82ca8e7 100644
--- a/inc/mo_dynamic.php
+++ b/inc/mo_dynamic.php
@@ -394,7 +394,7 @@ function shr($var,$amt) {
 						}
 
 						if ( $moitem->originals_table[$pos] == $key_len
-							 || ord( $mo_original{$key_len} ) == 0 ) {
+							 || ord( $mo_original[$key_len] ) == 0 ) {
 							// strings can only match if they have the same length, no need to inspect otherwise
 
 							if ( false !== ( $i = strpos( $mo_original, '0' ) ) )