diff --git a/openbsc/include/openbsc/auth.h b/openbsc/include/openbsc/auth.h
index 2364fb3..d41d141 100644
--- a/openbsc/include/openbsc/auth.h
+++ b/openbsc/include/openbsc/auth.h
@@ -6,7 +6,7 @@
 
 enum auth_action {
 	AUTH_NOT_AVAIL		= 0,	/* No auth tuple available */
-	AUTH_DO_AUTH_THAN_CIPH	= 1,	/* Firsth authenticate, then cipher */
+	AUTH_DO_AUTH_THEN_CIPH	= 1,	/* Firsth authenticate, then cipher */
 	AUTH_DO_CIPH		= 2,	/* Only ciphering */
 	AUTH_DO_AUTH		= 3,	/* Only authentication, no ciphering */
 };
diff --git a/openbsc/src/libmsc/auth.c b/openbsc/src/libmsc/auth.c
index 0a2f59e..65a9b03 100644
--- a/openbsc/src/libmsc/auth.c
+++ b/openbsc/src/libmsc/auth.c
@@ -132,6 +132,6 @@
         db_sync_lastauthtuple_for_subscr(atuple, subscr);
 
 	DEBUGP(DMM, "Need to do authentication and ciphering\n");
-	return AUTH_DO_AUTH_THAN_CIPH;
+	return AUTH_DO_AUTH_THEN_CIPH;
 }
 
diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c
index 1a1d6f2..1524ec4 100644
--- a/openbsc/src/libmsc/gsm_04_08.c
+++ b/openbsc/src/libmsc/gsm_04_08.c
@@ -231,7 +231,7 @@
 		/* FIXME: Should start a timer for completion ... */
 
 	/* Then do whatever is needed ... */
-	if (rc == AUTH_DO_AUTH_THAN_CIPH) {
+	if (rc == AUTH_DO_AUTH_THEN_CIPH) {
 		/* Start authentication */
 		return gsm48_tx_mm_auth_req(conn, op->atuple.rand, op->atuple.key_seq);
 	} else if (rc == AUTH_DO_CIPH) {