diff --git a/fhem/FHEM/10_OWServer.pm b/fhem/FHEM/10_OWServer.pm
index 8e72968c3..0c333bda2 100644
--- a/fhem/FHEM/10_OWServer.pm
+++ b/fhem/FHEM/10_OWServer.pm
@@ -605,7 +605,7 @@ OWServer_Set($@)
Get all readings (OWServer / OWDevice) via a child process. This ensures, that FHEM
is not blocked during communicating with the owserver.
Example:
- attr
+ attr <name> nonblocking 1