diff --git a/googletest/src/gtest.cc b/googletest/src/gtest.cc
index 0803cf32..08eaefbd 100644
--- a/googletest/src/gtest.cc
+++ b/googletest/src/gtest.cc
@@ -4888,7 +4888,8 @@ std::string StreamingListener::UrlEncode(const char* str) {
       case '=':
       case '&':
       case '\n':
-        result.append("%" + String::FormatByte(static_cast<unsigned char>(ch)));
+        result.push_back('%');
+        result.append(String::FormatByte(static_cast<unsigned char>(ch)));
         break;
       default:
         result.push_back(ch);