--- a/frontends/php/include/func.inc.php
+++ b/frontends/php/include/func.inc.php
@@ -401,6 +401,7 @@
 function str2mem($val) {
 	$val = trim($val);
 	$last = strtolower(substr($val, -1));
+	$val = (int) $val;
 
 	switch ($last) {
 		case 'g':