--- src/codecs/qutfcodec.cpp
+++ src/codecs/qutfcodec.cpp
@@ -165,7 +165,7 @@ public:
     QString toUnicode(const char* chars, int len)
     {
 	QString result;
-	result.setLength( len ); // worst case
+	result.setLength( len + 1 ); // worst case
 	QChar *qch = (QChar *)result.unicode();
 	uchar ch;
         int error = -1;