diff --git a/python/paddle/fluid/layers/control_flow.py b/python/paddle/fluid/layers/control_flow.py
index f8f461853f34a09eb2317f6ac93ad385cca3609f..c1b336db95c35607f3c24887033830baf6631c1f 100644
--- a/python/paddle/fluid/layers/control_flow.py
+++ b/python/paddle/fluid/layers/control_flow.py
@@ -189,6 +189,7 @@ def Print(input,
             'print_tensor_lod': print_tensor_lod,
             'print_phase': print_phase.upper()
         })
+    return input
 
 
 class BlockGuard(object):