1 files changed, 1 insertions, 3 deletions
diff --git a/blockdev.h b/blockdev.h
index 9c29948128..5f27b643be 100644
--- a/blockdev.h
+++ b/blockdev.h
@@ -17,8 +17,6 @@
 void blockdev_mark_auto_del(BlockDriverState *bs);
 void blockdev_auto_del(BlockDriverState *bs);
 
-#define BLOCK_SERIAL_STRLEN 20
-
 typedef enum {
     IF_DEFAULT = -1,            /* for use with drive_add() only */
     IF_NONE,
@@ -37,7 +35,7 @@ struct DriveInfo {
     int media_cd;
     int cyls, heads, secs, trans;
     QemuOpts *opts;
-    char serial[BLOCK_SERIAL_STRLEN + 1];
+    const char *serial;
     QTAILQ_ENTRY(DriveInfo) next;
     int refcount;
 };