diff --git a/paddle/framework/operator.h b/paddle/framework/operator.h
index 5efb945e81c70a519b73f450b97c553804dfcb3f..848baeeeb6493f61c41193a5cc0fc69e93934bfb 100644
--- a/paddle/framework/operator.h
+++ b/paddle/framework/operator.h
@@ -119,7 +119,7 @@ class OperatorBase {
  protected:
   std::string type_;
   // NOTE: in case of OpGrad, inputs_ contains:
-  // I (Inputs)
+  // I (Inputs)opear
   // O (Outputs)
   // OG (Output Gradients)
   VarNameMap inputs_;