diff --git a/win/resdefs.h.in b/win/resdefs.h.in
new file mode 100644
index 0000000..b61db53
--- /dev/null
+++ b/win/resdefs.h.in
@@ -0,0 +1,4 @@
+#define __VERSIONSTR "@VERSION@\0"
+#define __RCVERSION @RCVERSION@
+#define __RCVERSIONSTR "@RCVERSION@\0"
+#cmakedefine WIN64