diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index fd8b7bbbb4..5b70f92c03 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -74,6 +74,7 @@
      IOCTL(BLKFLSBUF, 0, TYPE_NULL)
      IOCTL(BLKRASET, 0, TYPE_INT)
      IOCTL(BLKRAGET, IOC_R, MK_PTR(TYPE_LONG))
+     IOCTL(BLKSSZGET, IOC_R, MK_PTR(TYPE_LONG))
 #ifdef FIBMAP
      IOCTL(FIBMAP, IOC_W | IOC_R, MK_PTR(TYPE_LONG))
 #endif