diff --git a/library/L1CTL_PortType.ttcn b/library/L1CTL_PortType.ttcn
index 019e2a7..7a9ee3e 100644
--- a/library/L1CTL_PortType.ttcn
+++ b/library/L1CTL_PortType.ttcn
@@ -5,6 +5,7 @@
 	import from UD_Types all;
 	import from Osmocom_Types all;
 	import from GSM_Types all;
+	import from GSM_RR_Types all;
 
 	type record L1CTL_connect {
 		charstring	path