diff --git a/src/windows.rc.in b/src/windows.rc.in
index 21c2b600..e90362f9 100644
--- a/src/windows.rc.in
+++ b/src/windows.rc.in
@@ -27,10 +27,34 @@ BEGIN
     100 "AVRDUDE"
 END
 
-#define VER_MAJOR @PROJECT_VERSION_MAJOR@
-#define VER_MINOR @PROJECT_VERSION_MINOR@
-#define VER_BUILD @PROJECT_VERSION_PATCH@
-#define VER_REVISION @PROJECT_VERSION_TWEAK@
+#cmakedefine PROJECT_VERSION_MAJOR @PROJECT_VERSION_MAJOR@
+#cmakedefine PROJECT_VERSION_MINOR @PROJECT_VERSION_MINOR@
+#cmakedefine PROJECT_VERSION_PATCH @PROJECT_VERSION_PATCH@
+#cmakedefine PROJECT_VERSION_TWEAK @PROJECT_VERSION_TWEAK@
+
+#ifdef PROJECT_VERSION_MAJOR
+#define VER_MAJOR PROJECT_VERSION_MAJOR
+#else
+#define VER_MAJOR 0
+#endif
+
+#ifdef PROJECT_VERSION_MINOR
+#define VER_MINOR PROJECT_VERSION_MINOR
+#else
+#define VER_MINOR 0
+#endif
+
+#ifdef PROJECT_VERSION_PATCH
+#define VER_BUILD PROJECT_VERSION_PATCH
+#else
+#define VER_BUILD 0
+#endif
+
+#ifdef PROJECT_VERSION_TWEAK
+#define VER_REVISION PROJECT_VERSION_TWEAK
+#else
+#define VER_REVISION 0
+#endif
 
 #define _STR(s) #s
 #define _VER_STR(a, b, c, d) _STR(a) "." _STR(b) "." _STR(c) "." _STR(d)