diff --git a/tools/offwaketime.py b/tools/offwaketime.py
index 964f062af60d..10b427a86fed 100755
--- a/tools/offwaketime.py
+++ b/tools/offwaketime.py
@@ -289,7 +289,7 @@ def signal_ignore(signal, frame):
     if folded:
         # print folded stack output
         line = \
-            [k.target] + \
+            [k.target.decode()] + \
             [b.sym(addr, k.tgid)
                 for addr in reversed(list(target_user_stack)[1:])] + \
             (["-"] if args.delimited else [""]) + \
@@ -301,7 +301,7 @@ def signal_ignore(signal, frame):
             (["-"] if args.delimited else [""]) + \
             [b.sym(addr, k.tgid)
                 for addr in reversed(list(waker_user_stack))] + \
-            [k.waker]
+            [k.waker.decode()]
         print("%s %d" % (";".join(line), v.value))
 
     else: