diff --git a/lib/util.py b/lib/util.py
index 1fdf1f7..e5c8674 100644
--- a/lib/util.py
+++ b/lib/util.py
@@ -57,12 +57,20 @@ class cachedproperty(object):
         return value
 
 
-def formatted_time(t):
+def formatted_time(t, sep=' '):
     '''Return a number of seconds as a string in days, hours, mins and
-    secs.'''
+    maybe secs.'''
     t = int(t)
-    return '{:d}d {:02d}h {:02d}m {:02d}s'.format(
-        t // 86400, (t % 86400) // 3600, (t % 3600) // 60, t % 60)
+    fmts = (('{:d}d', 86400), ('{:02d}h', 3600), ('{:02d}m', 60))
+    parts = []
+    for fmt, n in fmts:
+        val = t // n
+        if parts or val:
+            parts.append(fmt.format(val))
+        t %= n
+    if len(parts) < 3:
+        parts.append('{:02d}s'.format(t))
+    return sep.join(parts)
 
 
 def deep_getsizeof(obj):
diff --git a/server/controller.py b/server/controller.py
index f814e6f..db161c8 100644
--- a/server/controller.py
+++ b/server/controller.py
@@ -464,6 +464,7 @@ class Controller(util.LoggedClass):
             'sessions': self.session_count(),
             'subs': self.sub_count(),
             'txs_sent': self.txs_sent,
+            'uptime': util.formatted_time(time.time() - self.start_time),
         }
 
     def sub_count(self):
@@ -515,12 +516,6 @@ class Controller(util.LoggedClass):
         '''A generator returning lines for a list of sessions.
 
         data is the return value of rpc_sessions().'''
-
-        def time_fmt(t):
-            t = int(t)
-            return ('{:3d}:{:02d}:{:02d}'
-                    .format(t // 3600, (t % 3600) // 60, t % 60))
-
         fmt = ('{:<6} {:<5} {:>17} {:>5} {:>5} '
                '{:>7} {:>7} {:>7} {:>7} {:>7} {:>9} {:>21}')
         yield fmt.format('ID', 'Flags', 'Client', 'Reqs', 'Txs', 'Subs',
@@ -535,7 +530,7 @@ class Controller(util.LoggedClass):
                              '{:,d}'.format(recv_size // 1024),
                              '{:,d}'.format(send_count),
                              '{:,d}'.format(send_size // 1024),
-                             time_fmt(time), peer)
+                             util.formatted_time(time, sep=''), peer)
 
     def session_data(self, for_log):
         '''Returned to the RPC 'sessions' call.'''