diff --git a/src/client.h b/src/client.h
index 9c220bdd917233f7ea859589d1286ea6d7c6adb4..55fba71d25a42016ad7ec62bc12d9cdff696eab7 100644
--- a/src/client.h
+++ b/src/client.h
@@ -34,9 +34,11 @@
 #ifdef _WIN32
     #define EXEFILE "bin/client.exe"
     #define COLLECTDATAFILE "data/collect-data.xml"
+    #define OS 1
 #else
     #define EXEFILE "bin/client"
     #define COLLECTDATAFILE "../data/collect-data.xml"
+    #define OS 0
 #endif
 #define UPDATEOPTION "update"
 #define INVENTORYOPTION "inventory"