--- a/src//lib/EBOOKCharsetConverter.cpp
+++ b/src/lib/EBOOKCharsetConverter.cpp
@@ -124,7 +124,7 @@ bool EBOOKCharsetConverter::convertBytes(const char *c
       m_converterToUTF8.get(), m_converterToUnicode.get(),
       &outText, outText + out.size(), &inText, inText + length,
       nullptr, nullptr, nullptr, nullptr,
-      TRUE, TRUE, &status)
+      true, true, &status)
     ;
     if (status==U_BUFFER_OVERFLOW_ERROR)
     {
