diff --git a/actions/dynamicdns b/actions/dynamicdns
index ea482b31c..f465f3a0d 100755
--- a/actions/dynamicdns
+++ b/actions/dynamicdns
@@ -322,6 +322,7 @@ doUpdate()
     fi
 }
 
+umask u=rw,g=,o=
 cmd=${1}
 shift
 # decide which config to use