diff --git a/network/raisecom/snmp/mode/memory.pm b/network/raisecom/snmp/mode/memory.pm
index 10c78879a..7528c93a9 100644
--- a/network/raisecom/snmp/mode/memory.pm
+++ b/network/raisecom/snmp/mode/memory.pm
@@ -66,7 +66,7 @@ sub run {
                                          nothing_quit => 1);
     
     my $free_size = $result->{$oid_raisecomAvailableMemory} * 1024;
-    my $total_size = $result->{$oid_raisecomAvailableMemory} * 1024;
+    my $total_size = $result->{$oid_raisecomTotalMemory} * 1024;
     my $used_size = $total_size - $free_size;
     
     my $prct_used = $used_size * 100 / $total_size;