diff --git a/src/json2pb/json_to_pb.cpp b/src/json2pb/json_to_pb.cpp
index 60ba4fdfc9..4d4fbfa3c5 100644
--- a/src/json2pb/json_to_pb.cpp
+++ b/src/json2pb/json_to_pb.cpp
@@ -334,11 +334,15 @@ static bool JsonValueToProtoField(const BUTIL_RAPIDJSON_NAMESPACE::Value& value,
                     const BUTIL_RAPIDJSON_NAMESPACE::Value & item = value[index];       \
                     if (TYPE_MATCH == J2PCHECKTYPE(item, cpptype, jsontype)) { \
                         reflection->Add##method(message, field, item.Get##jsontype()); \
+                    } else {                                             \
+                        return false;                                    \
                     }                                                   \
                 }                                                       \
             } else if (TYPE_MATCH == J2PCHECKTYPE(value, cpptype, jsontype)) { \
                 reflection->Set##method(message, field, value.Get##jsontype()); \
-            }                                                           \
+            } else {                                                   \
+                return false;                                          \
+            }                                                          \
             break;                                                      \
         }                                                               \
           
@@ -430,7 +434,9 @@ static bool JsonValueToProtoField(const BUTIL_RAPIDJSON_NAMESPACE::Value& value,
                         str = str_decoded;
                     }
                     reflection->AddString(message, field, str);
-                }  
+                } else {
+                    return false;
+                }
             }
         } else if (TYPE_MATCH == J2PCHECKTYPE(value, string, String)) {
             std::string str(value.GetString(), value.GetStringLength());
@@ -444,6 +450,8 @@ static bool JsonValueToProtoField(const BUTIL_RAPIDJSON_NAMESPACE::Value& value,
                 str = str_decoded;
             }
             reflection->SetString(message, field, str);
+        } else {
+            return false;
         }
         break;
 
diff --git a/test/brpc_protobuf_json_unittest.cpp b/test/brpc_protobuf_json_unittest.cpp
index 3565772e1d..917f2e0117 100644
--- a/test/brpc_protobuf_json_unittest.cpp
+++ b/test/brpc_protobuf_json_unittest.cpp
@@ -494,7 +494,7 @@ TEST_F(ProtobufJsonTest, json_to_pb_expected_failed_case) {
     JsonContextBody data9;
     ret = json2pb::JsonToProtoMessage(info3, &data9, &error);
     ASSERT_FALSE(ret);
-    ASSERT_STREQ("Invalid value `23' for optional field `Content.uid' which SHOULD be string, Missing required field: Ext.databyte", error.data());
+    ASSERT_STREQ("Invalid value `23' for optional field `Content.uid' which SHOULD be string", error.data());
 }
 
 TEST_F(ProtobufJsonTest, json_to_pb_perf_case) {