diff --git a/lib/system.h b/lib/system.h

index ef46267..e7f531c 100644

--- a/lib/system.h

+++ b/lib/system.h

@@ -389,9 +389,16 @@ extern int errno;

 # define ST_NBLOCKSIZE 512

 #endif

+/* Network Appliance file systems store small files directly in the

+   inode if st_size <= 64; in this case the number of blocks can be

+   zero.  Perhaps other file systems have similar problems; so,

+   somewhat arbitrarily, do not consider a file to be sparse if

+   it has no blocks but st_size < ST_NBLOCKSIZE.  */

 #define ST_IS_SPARSE(st)                                  \

   (ST_NBLOCKS (st)                                        \

-    < ((st).st_size / ST_NBLOCKSIZE + ((st).st_size % ST_NBLOCKSIZE != 0)))

+   < ((st).st_size / ST_NBLOCKSIZE			  \

+      + ((st).st_size % ST_NBLOCKSIZE != 0		  \

+	 && (st).st_size / ST_NBLOCKSIZE != 0)))

 /* Declare standard functions.  */