diff --git a/paddle/framework/op_registry.h b/paddle/framework/op_registry.h
index d26c0b50d80ae7cec0fc1e25b6980c34af82deff..98ef426b108848feab43e4163e08100496fc2f77 100644
--- a/paddle/framework/op_registry.h
+++ b/paddle/framework/op_registry.h
@@ -234,7 +234,7 @@ class OpRegistry {
                               const AttributeMap& attrs) {
     auto op_create_it = creators().find(type);
     PADDLE_ENFORCE(op_create_it != creators().end(),
-                   "Operator %s cannot be found", type);
+                   "Operator %s cannot be found.", type);
 
     auto op = op_create_it->second();
     op->type_ = type;