diff --git a/include/openbsc/sgsn.h b/include/openbsc/sgsn.h
index 57b2978..f371dc6 100644
--- a/include/openbsc/sgsn.h
+++ b/include/openbsc/sgsn.h
@@ -112,7 +112,7 @@
 	} dcomp_v42bis;
 
 	struct {
-		enum nsap_addr_enc rab_assign_addr_enc;
+		int rab_assign_addr_enc;
 	} iu;
 };