diff --git a/aprsis.c b/aprsis.c
index 59f0707..91a97d0 100644
--- a/aprsis.c
+++ b/aprsis.c
@@ -952,9 +952,9 @@ void aprsis_start(void) {
 	if (debug) printf("aprsis_start() PTHREAD  socketpair(up=%d,down=%d)\n", aprsis_up, aprsis_down);
 
 	pthread_attr_init(&pthr_attrs);
-	/* 64 kB stack is enough for this thread (I hope!)
+	/* 78 kB stack is enough for this thread (I hope!)
 	   default of 2 MB is way too much...*/
-	pthread_attr_setstacksize(&pthr_attrs, 64*1024);
+	pthread_attr_setstacksize(&pthr_attrs, 78*1024);
 
 	i = pthread_create(&aprsis_thread, &pthr_attrs, (void*)aprsis_runthread, NULL);
 	if (i == 0) {