diff --git a/paddle/operators/scale_op.cc b/paddle/operators/scale_op.cc
index f634ebe9a2a4648bd08f00af635ef22e8d86a8de..c0e614743a894dece2cdc395d0b28df7e86e921d 100644
--- a/paddle/operators/scale_op.cc
+++ b/paddle/operators/scale_op.cc
@@ -48,7 +48,7 @@ Scale operator
 $$Out = scale*X$$
 )DOC");
     AddAttr<AttrType>("scale",
-                      "(float, default 0)"
+                      "(float, default 1.0)"
                       "The scaling factor of the scale operator.")
         .SetDefault(1.0);
   }