diff --git a/include/json/writer.h b/include/json/writer.h
index 655ebff..7c56a21 100644
--- a/include/json/writer.h
+++ b/include/json/writer.h
@@ -351,6 +351,7 @@ String JSON_API valueToString(
     PrecisionType precisionType = PrecisionType::significantDigits);
 String JSON_API valueToString(bool value);
 String JSON_API valueToQuotedString(const char* value);
+String JSON_API valueToQuotedString(const char* value, size_t length);
 
 /// \brief Output using the StyledStreamWriter.
 /// \see Json::operator>>()
diff --git a/src/lib_json/json_writer.cpp b/src/lib_json/json_writer.cpp
index 239c429..5bb5dd1 100644
--- a/src/lib_json/json_writer.cpp
+++ b/src/lib_json/json_writer.cpp
@@ -354,6 +354,10 @@ String valueToQuotedString(const char* value) {
   return valueToQuotedStringN(value, strlen(value));
 }
 
+String valueToQuotedString(const char* value, size_t length) {
+  return valueToQuotedStringN(value, length);
+}
+
 // Class Writer
 // //////////////////////////////////////////////////////////////////
 Writer::~Writer() = default;
@@ -491,7 +495,7 @@ void StyledWriter::writeValue(const Value& value) {
         const String& name = *it;
         const Value& childValue = value[name];
         writeCommentBeforeValue(childValue);
-        writeWithIndent(valueToQuotedString(name.c_str()));
+        writeWithIndent(valueToQuotedString(name.c_str(), name.size()));
         document_ += " : ";
         writeValue(childValue);
         if (++it == members.end()) {
@@ -709,7 +713,7 @@ void StyledStreamWriter::writeValue(const Value& value) {
         const String& name = *it;
         const Value& childValue = value[name];
         writeCommentBeforeValue(childValue);
-        writeWithIndent(valueToQuotedString(name.c_str()));
+        writeWithIndent(valueToQuotedString(name.c_str(), name.size()));
         *document_ << " : ";
         writeValue(childValue);
         if (++it == members.end()) {