1 files changed, 4 insertions, 3 deletions

diff --git a/util-linux/volume_id/get_devname.c b/util-linux/volume_id/get_devname.c
index a1786df1c..0686a0741 100644
--- a/util-linux/volume_id/get_devname.c
+++ b/util-linux/volume_id/get_devname.c
@@ -7,11 +7,12 @@
  *
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
-
+#include <sys/mount.h> /* BLKGETSIZE64 */
+#if !defined(BLKGETSIZE64)
+# define BLKGETSIZE64 _IOR(0x12,114,size_t)
+#endif
 #include "volume_id_internal.h"
 
-//#define BLKGETSIZE64 _IOR(0x12,114,size_t)
-
 static struct uuidCache_s {
         struct uuidCache_s *next;
 //      int major, minor;