--- src/configurationmanager.h	2018-10-03 16:27:51.311763612 +0200
+++ -	2018-10-03 16:29:44.035272722 +0200
@@ -23,6 +23,10 @@
 #include <map>
 #include <set>
 
+#ifndef _WIN32
+#include <sys/file.h> // LOCK_EX and LOCK_NB
+#endif
+
 #define CONFIGURATIONSTOREDBYVERSION -2
 class ConfigurationManager
 {