diff --git a/plugins/snmp/snmp__if_combined b/plugins/snmp/snmp__if_combined
index 7b6e3cb1..92105d9c 100755
--- a/plugins/snmp/snmp__if_combined
+++ b/plugins/snmp/snmp__if_combined
@@ -806,7 +806,7 @@ send.negative recv
 send.min 0
 END
 
-    if ( defined($speed) ) {
+    if ( defined($speed) && $speed > 0) {
         printf("recv.max %s\nsend.max %s\n", $speed, $speed);
     }