diff --git a/docs/protocol/serialization/signalproxy_rpc.md b/docs/protocol/serialization/signalproxy_rpc.md
index fc2a46c65374c3233dcfc2018ddfb1e1b29e63f6..116636e94d84d82ebfb94c2e844f47942979874c 100644
--- a/docs/protocol/serialization/signalproxy_rpc.md
+++ b/docs/protocol/serialization/signalproxy_rpc.md
@@ -1,5 +1,8 @@
 # SignalProxy RPC calls
 
+For RPC calls, the full name – e.g. "2createIdentity(Identity,QVariantMap)" has
+to be transmitted, including the number at the beginning and the arglist.
+
 ## C->S calls
 
 ### `2createIdentity(Identity,QVariantMap)`