diff --git a/win-linux/package/windows/associate_page.iss b/win-linux/package/windows/associate_page.iss
index 449e31463..d90c5e75d 100644
--- a/win-linux/package/windows/associate_page.iss
+++ b/win-linux/package/windows/associate_page.iss
@@ -1,5 +1,7 @@
 
-#define ASSC_APP_NAME 'ONLYOFFICE'
+#if !defined(ASSC_APP_NAME)
+# define ASSC_APP_NAME 'ONLYOFFICE'
+#endif
 
 [Setup]
 ChangesAssociations=true