diff --git a/Lib/telnetlib.py b/Lib/telnetlib.py
index 3523037..a13e85c 100644
--- a/Lib/telnetlib.py
+++ b/Lib/telnetlib.py
@@ -311,6 +311,8 @@
         s_args = s_reply
         if timeout is not None:
             s_args = s_args + (timeout,)
+            from time import time
+            time_start = time()
         while not self.eof and select.select(*s_args) == s_reply:
             i = max(0, len(self.cookedq)-n)
             self.fill_rawq()
@@ -321,6 +323,11 @@
                 buf = self.cookedq[:i]
                 self.cookedq = self.cookedq[i:]
                 return buf
+            if timeout is not None:
+                elapsed = time() - time_start
+                if elapsed >= timeout:
+                    break
+                s_args = s_reply + (timeout-elapsed,)
         return self.read_very_lazy()
 
     def read_all(self):
@@ -601,6 +608,9 @@
             if not hasattr(list[i], "search"):
                 if not re: import re
                 list[i] = re.compile(list[i])
+        if timeout is not None:
+            from time import time
+            time_start = time()
         while 1:
             self.process_rawq()
             for i in indices:
@@ -613,7 +623,11 @@
             if self.eof:
                 break
             if timeout is not None:
-                r, w, x = select.select([self.fileno()], [], [], timeout)
+                elapsed = time() - time_start
+                if elapsed >= timeout:
+                    break
+                s_args = ([self.fileno()], [], [], timeout-elapsed)
+                r, w, x = select.select(*s_args)
                 if not r:
                     break
             self.fill_rawq()