1 files changed, 2 insertions, 2 deletions
diff --git a/runtime/utils.cc b/runtime/utils.cc
index 20a53b7c69..c4b044110c 100644
--- a/runtime/utils.cc
+++ b/runtime/utils.cc
@@ -303,7 +303,7 @@ std::string PrintableChar(uint16_t ch) {
   if (NeedsEscaping(ch)) {
     StringAppendF(&result, "\\u%04x", ch);
   } else {
-    result += ch;
+    result += static_cast<std::string::value_type>(ch);
   }
   result += '\'';
   return result;
@@ -330,7 +330,7 @@ std::string PrintableString(const char* utf) {
       if (NeedsEscaping(leading)) {
         StringAppendF(&result, "\\u%04x", leading);
       } else {
-        result += leading;
+        result += static_cast<std::string::value_type>(leading);
       }
 
       const uint32_t trailing = GetTrailingUtf16Char(ch);