diff --git a/library/library.pro b/library/library.pro
index f7315cf..e008d61 100644
--- a/library/library.pro
+++ b/library/library.pro
@@ -12,6 +12,10 @@ INCLUDEPATH += $$_PRO_FILE_PWD_/include/rapidjson
 #Version is set in yocto recipe with "EXTRA_QMAKEVARS_PRE"
 #VERSION=1.0.0
 
+# 04.06.2024: Fix for Szeged: read price for daily ticket directly from entry
+#             PaymentOptions in tariff-file if it is not given as part of a
+#             Json-Product-Array in tariff-file.
+
 CONFIG(debug, debug|release) {
     win32 {
         QMAKE_CXXFLAGS += -DCALCULATE_LIBRARY_EXPORTS