--- /dev/null
+Index: cramfs-1.1/cramfsck.c
+===================================================================
+--- cramfs-1.1.orig/cramfsck.c 2011-09-09 15:10:06.000000000 +0200
++++ cramfs-1.1/cramfsck.c 2011-09-09 15:13:49.950897747 +0200
+@@ -57,6 +57,10 @@
+ #include <byteswap.h>
+ #include <zlib.h>
+
++#ifdef __CYGWIN__
++#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
++#endif /* __CYGWIN__ */
++
+ /* Exit codes used by fsck-type programs */
+ #define FSCK_OK 0 /* No errors */
+ #define FSCK_NONDESTRUCT 1 /* File system errors corrected */