diff --git a/lib/rpc_backend b/lib/rpc_backend
index 0ee46dc..97b1aa4 100644
--- a/lib/rpc_backend
+++ b/lib/rpc_backend
@@ -24,6 +24,8 @@
 _XTRACE_RPC_BACKEND=$(set +o | grep xtrace)
 set +o xtrace
 
+RABBIT_USERID=${RABBIT_USERID:-stackrabbit}
+
 # Functions
 # ---------