diff --git a/samples/wrapper/wrapper.cpp b/samples/wrapper/wrapper.cpp
index 5bc41122c76c611ccf0aa7c703e11af58fcd79a8..ee731a216e2963fd7472ee8841030e2cfd26d074 100644
--- a/samples/wrapper/wrapper.cpp
+++ b/samples/wrapper/wrapper.cpp
@@ -42,8 +42,12 @@
 //
 #define CHECK_EXECUTABLES
 
-#ifndef _WIN32
 #include "config.h"
+#ifndef _WIN32
+#include "svn_version.h"
+#endif
+#ifndef SVN_VERSION
+#define SVN_VERSION "Unknown"
 #endif
 #include <stdio.h>
 #include <vector>
@@ -68,7 +72,6 @@
 #endif
 
 #include "version.h"
-#include "svn_version.h"
 #include "boinc_api.h"
 #include "app_ipc.h"
 #include "graphics2.h"