diff --git a/aos/json_tokenizer.cc b/aos/json_tokenizer.cc
index 9bb457c..0e235e6 100644
--- a/aos/json_tokenizer.cc
+++ b/aos/json_tokenizer.cc
@@ -378,7 +378,8 @@
               ConsumeWhitespace();
               state_ = State::kExpectObjectEnd;
             } else {
-              fprintf(stderr, "Error on line %d, expected } or ,\n", linenumber_);
+              fprintf(stderr, "Error on line %d, expected } or ,\n",
+                      linenumber_);
               return TokenType::kError;
             }
             break;
@@ -387,7 +388,8 @@
               ConsumeWhitespace();
               state_ = State::kExpectArrayEnd;
             } else {
-              fprintf(stderr, "Error on line %d, expected ] or ,\n", linenumber_);
+              fprintf(stderr, "Error on line %d, expected ] or ,\n",
+                      linenumber_);
               return TokenType::kError;
             }
             break;