diff --git a/asn1/camel/camel.cnf b/asn1/camel/camel.cnf
index ed4b3c9a0e..6cd105082d 100644
--- a/asn1/camel/camel.cnf
+++ b/asn1/camel/camel.cnf
@@ -6,6 +6,10 @@
 #.IMPORT ../gsmmap/gsm_map-exp.cnf
 #.IMPORT ../inap/inap-exp.cnf
 
+# forward declarations for Remote-Operations-Information-Objects.asn wich is compiled too
+#.CLASS OPERATION
+#.CLASS ERROR
+
 #.MODULE
 CS1-DataTypes  inap
 CS2-datatypes  inap