diff --git a/YACReaderLibrary/server/requestmapper.cpp b/YACReaderLibrary/server/requestmapper.cpp
index 6c012f56..c0694c97 100644
--- a/YACReaderLibrary/server/requestmapper.cpp
+++ b/YACReaderLibrary/server/requestmapper.cpp
@@ -48,6 +48,8 @@
 
 #include "QsLog.h"
 
+#include <QRegExp>
+
 using stefanfrings::HttpRequest;
 using stefanfrings::HttpRequestHandler;
 using stefanfrings::HttpResponse;