diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c
index d81dab9..a299590 100644
--- a/openbsc/src/libmsc/gsm_04_08.c
+++ b/openbsc/src/libmsc/gsm_04_08.c
@@ -520,7 +520,7 @@
 	case GSM48_LUPD_NORMAL:
 		return "NORMAL";
 	case GSM48_LUPD_PERIODIC:
-		return "PEROIDOC";
+		return "PERIODIC";
 	case GSM48_LUPD_IMSI_ATT:
 		return "IMSI ATTACH";
 	default: