diff --git a/src/core/marketplace.cpp b/src/core/marketplace.cpp
index 426080e..aab11de 100644
--- a/src/core/marketplace.cpp
+++ b/src/core/marketplace.cpp
@@ -136,7 +136,7 @@ void Marketplace::removeSale(boost::uuids::uuid uuid)
 
 void Marketplace::exportReportToCSV(const std::string& filename, int feeInPercent, int maxFeeInEuro)
 {
-    const unsigned char delimiter = ',';
+    const char delimiter = ',';
     std::ofstream file(filename);
 
     file << "Verk.Nr." << delimiter << "Nachname" << delimiter << "Vorname" << delimiter