3 files changed, 19 insertions, 5 deletions
diff --git a/winsup/cygwin/include/cygwin/stat.h b/winsup/cygwin/include/cygwin/stat.h
index 90abc3999..0ac22a679 100644
--- a/winsup/cygwin/include/cygwin/stat.h
+++ b/winsup/cygwin/include/cygwin/stat.h
@@ -19,13 +19,13 @@ extern "C" {
 #ifdef __INSIDE_CYGWIN__
 struct __stat32
 {
-  dev_t         st_dev;
+  __dev16_t     st_dev;
   ino_t         st_ino;
   mode_t        st_mode;
   nlink_t       st_nlink;
   __uid16_t     st_uid;
   __gid16_t     st_gid;
-  dev_t         st_rdev;
+  __dev16_t     st_rdev;
   __off32_t     st_size;
   time_t        st_atime;
   long          st_spare1;
@@ -40,13 +40,13 @@ struct __stat32
 
 struct __stat64
 {
-  dev_t         st_dev;
+  __dev32_t     st_dev;
   ino_t         st_ino;
   mode_t        st_mode;
   nlink_t       st_nlink;
   __uid32_t     st_uid;
   __gid32_t     st_gid;
-  dev_t         st_rdev;
+  __dev32_t     st_rdev;
   __off64_t     st_size;
   time_t        st_atime;
   long          st_spare1;
diff --git a/winsup/cygwin/include/cygwin/types.h b/winsup/cygwin/include/cygwin/types.h
index 92b60b7a3..8f9f16105 100644
--- a/winsup/cygwin/include/cygwin/types.h
+++ b/winsup/cygwin/include/cygwin/types.h
@@ -27,6 +27,14 @@ typedef __off64_t off_t;
 typedef __off32_t off_t;
 #endif
 
+typedef short __dev16_t;
+typedef unsigned long __dev32_t;
+#ifdef __CYGWIN_USE_BIG_TYPES__
+typedef __dev32_t dev_t;
+#else
+typedef __dev16_t dev_t;
+#endif
+
 typedef long blksize_t;
 
 typedef long __blkcnt32_t;
diff --git a/winsup/cygwin/include/sys/sysmacros.h b/winsup/cygwin/include/sys/sysmacros.h
index cc3a69160..2c9c69923 100644
--- a/winsup/cygwin/include/sys/sysmacros.h
+++ b/winsup/cygwin/include/sys/sysmacros.h
@@ -11,8 +11,14 @@ details. */
 #ifndef _SYS_SYSMACROS_H
 #define _SYS_SYSMACROS_H
 
+#ifdef __CYGWIN_USE_BIG_TYPES__
+#define major(dev) ((int)(((dev) >> 16) & 0xffff))
+#define minor(dev) ((int)((dev) & 0xffff))
+#define makedev(major, minor) (((major) << 16) | ((minor) & 0xffff))
+#else
 #define major(dev) ((int)(((dev) >> 8) & 0xff))
 #define minor(dev) ((int)((dev) & 0xff))
-#define makedev(major, minor) (((major) << 8) | (minor))
+#define makedev(major, minor) (((major) << 8) | ((minor) & 0xff))
+#endif
 
 #endif /* _SYS_SYSMACROS_H */