diff --git a/sendxmpp.sh b/sendxmpp.sh
index 925caaa..4641bad 100644
--- a/sendxmpp.sh
+++ b/sendxmpp.sh
@@ -1,5 +1,8 @@
 #!/bin/sh
 
+[ -n PLUGIN_USERNAME ] && PLUGIN_USERNAME="${SENDXMPP_USERNAME}"
+[ -n PLUGIN_PASSWORD ] && PLUGIN_PASSWORD="${SENDXMPP_PASSWORD}"
+
 : ${PLUGIN_USERNAME?"missing username"}
 : ${PLUGIN_JSERVER?"missing jserver"}
 : ${PLUGIN_PASSWORD?"missing password"}