diff --git a/include/osmocom/gsm/protocol/gsm_08_58.h b/include/osmocom/gsm/protocol/gsm_08_58.h
index cd28caf..363f33d 100644
--- a/include/osmocom/gsm/protocol/gsm_08_58.h
+++ b/include/osmocom/gsm/protocol/gsm_08_58.h
@@ -56,7 +56,7 @@
 #if OSMO_IS_BIG_ENDIAN
 		uint8_t cbits:2,
 			na:1,
-			reserved:2;
+			reserved:2,
 			sapi:3;
 #elif OSMO_IS_LITTLE_ENDIAN
 		uint8_t sapi:3,