diff --git a/include/osmocom/gsm/protocol/gsm_04_08.h b/include/osmocom/gsm/protocol/gsm_04_08.h
index a7ab612..e54084f 100644
--- a/include/osmocom/gsm/protocol/gsm_04_08.h
+++ b/include/osmocom/gsm/protocol/gsm_04_08.h
@@ -1496,7 +1496,7 @@
 #define GSM48_T305	30, 0
 #define GSM48_T306	30, 0
 #define GSM48_T308	10, 0		/* no spec default */
-#define GSM48_T310	180, 0		/* no spec default */
+#define GSM48_T310	30, 0		/* no spec default */
 #define GSM48_T313	30, 0		/* no spec default */
 #define GSM48_T323	30, 0
 #define GSM48_T331	30, 0		/* no spec default */