diff --git a/include/osmocom/msc/ran_msg.h b/include/osmocom/msc/ran_msg.h
index 816ef1f..0714607 100644
--- a/include/osmocom/msc/ran_msg.h
+++ b/include/osmocom/msc/ran_msg.h
@@ -103,7 +103,7 @@
 		struct geran_encr *chosen_key;
 	} geran;
 	struct {
-		bool uea_encryption;
+		uint8_t uea_encryption_mask;
 	} utran;
 };