diff --git a/src/value.cc b/src/value.cc
index ea9f96ef..f3f6189e 100644
--- a/src/value.cc
+++ b/src/value.cc
@@ -61,6 +61,9 @@ std::ostream &operator<<(std::ostream &stream, const QuotedString &s)
     case '\n':
       stream << "\\n";
       break;
+    case '\r':
+      stream << "\\r";
+      break;
     case '"':
     case '\\':
       stream << '\\';