diff --git a/doc/README.dissector b/doc/README.dissector
index 3fdc91af17..61384b5df4 100644
--- a/doc/README.dissector
+++ b/doc/README.dissector
@@ -2710,15 +2710,15 @@ and to exchange data between dissectors across a single packet (packet scope).
 It is also used to provide packet data for Decode As dialog (packet scope).
 
 void
-p_add_proto_data(wmem_allocator_t *scope, frame_data *fd, int proto, guint32 key, void *proto_data)
+p_add_proto_data(wmem_allocator_t *scope, packet_info *pinfo, int proto, guint32 key, void *proto_data)
 void *
-p_get_proto_data(wmem_allocator_t *scope, frame_data *fd, int proto, guint32 key)
+p_get_proto_data(wmem_allocator_t *scope, packet_info *pinfo, int proto, guint32 key)
 
 Where:
     scope      - Lifetime of the data to be stored, typically wmem_file_scope()
                  or pinfo->pool (packet scope).  Must match scope of data
                  allocated.
-    fd         - The fd pointer in the pinfo structure, pinfo->fd
+    pinfo      - The packet info pointer.
     proto      - Protocol id returned by the proto_register_protocol call
                  during initialization
     key        - key associated with 'proto_data'