diff --git a/includes/polling/functions.inc.php b/includes/polling/functions.inc.php
index 234c433fd5..1cccfcfa1c 100644
--- a/includes/polling/functions.inc.php
+++ b/includes/polling/functions.inc.php
@@ -388,10 +388,10 @@ function poll_mib_def($device, $mib_name_table, $mib_subdir, $mib_oids, $mib_gra
         list($splitoid, $splitindex) = explode('.', $fulloid, 2);
         $val = $snmpdata[$splitindex][$splitoid];
         if (is_numeric($val)) {
-            $rrdupdate .= ':'.$val;
+            $fields[$oidnamelist[$oid_count]] = $val;
         }
         elseif (preg_match("/^\"(.*)\"$/", $val, $number) && is_numeric($number[1])) {
-            $rrdupdate .= ':'.$number[1];
+            $fields[$oidnamelist[$oid_count]] = $number[1];
         }
         else {
             $fields[$oidnamelist[$oid_count]] = 'U';