diff --git a/check_qnap_health/control b/check_qnap_health/control
index 50bfb8a..f9823c3 100644
--- a/check_qnap_health/control
+++ b/check_qnap_health/control
@@ -2,5 +2,5 @@ Homepage: https://github.com/Mikesch-mp/qnap_health
 Watch: https://raw.githubusercontent.com/Mikesch-mp/qnap_health/master/qnap_health plgVer=([0-9.]+)
 Uploaders: Jan Wagner <waja@cyconet.org>
 Description: plugin to check NAS QNAP.
-Recommends: snmp
+Recommends: bc, gawk | mawk, snmp
 Version: 1.00