diff --git a/bin/u2c.py b/bin/u2c.py
index 6cbbf89d..2bdcf2f9 100755
--- a/bin/u2c.py
+++ b/bin/u2c.py
@@ -1090,6 +1090,8 @@ class Ctl(object):
 
             spd = humansize(spd)
             self.eta = str(datetime.timedelta(seconds=int(eta)))
+            if eta > 2591999:
+                self.eta = self.eta.split(",")[0]  # truncate HH:MM:SS
             sleft = humansize(self.nbytes - self.up_b)
             nleft = self.nfiles - self.up_f
             tail = "\033[K\033[u" if VT100 and not self.ar.ns else "\r"
diff --git a/copyparty/web/util.js b/copyparty/web/util.js
index 35f16372..67d88b95 100644
--- a/copyparty/web/util.js
+++ b/copyparty/web/util.js
@@ -881,6 +881,8 @@ if (window.Number && Number.isFinite)
 
 function f2f(val, nd) {
     // 10.toFixed(1) returns 10.00 for certain values of 10
+    if (!isNum(val))
+        val = 999;
     val = (val * Math.pow(10, nd)).toFixed(0).split('.')[0];
     return nd ? (val.slice(0, -nd) || '0') + '.' + val.slice(-nd) : val;
 }