diff --git a/fhem/FHEM/10_MYSENSORS_DEVICE.pm b/fhem/FHEM/10_MYSENSORS_DEVICE.pm
index f95857a99..2b417d571 100644
--- a/fhem/FHEM/10_MYSENSORS_DEVICE.pm
+++ b/fhem/FHEM/10_MYSENSORS_DEVICE.pm
@@ -77,6 +77,7 @@ BEGIN {
     AssignIoPort
     Log3
     SetExtensions
+    ReadingsVal
   ))
 };