diff --git a/drivers/telitmodem/gprs-context-ncm.c b/drivers/telitmodem/gprs-context-ncm.c
index 53edcbe6..7139740c 100644
--- a/drivers/telitmodem/gprs-context-ncm.c
+++ b/drivers/telitmodem/gprs-context-ncm.c
@@ -267,7 +267,7 @@ static void setup_cb(gboolean ok, GAtResult *result, gpointer user_data)
 {
 	struct ofono_gprs_context *gc = user_data;
 	struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
-	char buf[128];
+	char buf[384];
 
 	DBG("ok %d", ok);