Index: boot/Makefile
===================================================================
--- boot/Makefile	(revision 7dfd339f20e69736b42a538ac3c1d33bb99cebcb)
+++ boot/Makefile	(revision 14f21007dc0cf82ed243c0420406da06d1dd6c47)
@@ -48,5 +48,5 @@
 endif
 ifeq ($(RDFMT),fat)
-	$(MKFAT) $(DIST_PATH) $@
+	$(MKFAT) 1048576 $(DIST_PATH) $@
 endif
 
Index: contrib/conf/ia32-qe.sh
===================================================================
--- contrib/conf/ia32-qe.sh	(revision 7dfd339f20e69736b42a538ac3c1d33bb99cebcb)
+++ contrib/conf/ia32-qe.sh	(revision 14f21007dc0cf82ed243c0420406da06d1dd6c47)
@@ -5,5 +5,5 @@
 # Create a disk image if it does not exist
 if [ ! -f "$DISK_IMG" ]; then
-	tools/mkfat.py uspace/dist/data "$DISK_IMG"
+	tools/mkfat.py 1048576 uspace/dist/data "$DISK_IMG"
 fi
 
Index: contrib/conf/mips32-gx.sh
===================================================================
--- contrib/conf/mips32-gx.sh	(revision 7dfd339f20e69736b42a538ac3c1d33bb99cebcb)
+++ contrib/conf/mips32-gx.sh	(revision 14f21007dc0cf82ed243c0420406da06d1dd6c47)
@@ -5,5 +5,5 @@
 # Create a disk image if it does not exist
 if [ ! -f "$DISK_IMG" ]; then
-	tools/mkfat.py uspace/dist/data "$DISK_IMG"
+	tools/mkfat.py 1048576 uspace/dist/data "$DISK_IMG"
 fi
 
Index: tools/mkfat.py
===================================================================
--- tools/mkfat.py	(revision 7dfd339f20e69736b42a538ac3c1d33bb99cebcb)
+++ tools/mkfat.py	(revision 14f21007dc0cf82ed243c0420406da06d1dd6c47)
@@ -343,12 +343,18 @@
 def usage(prname):
 	"Print usage syntax"
-	print prname + " <PATH> <IMAGE>"
+	print prname + " <EXTRA_BYTES> <PATH> <IMAGE>"
 
 def main():
-	if (len(sys.argv) < 3):
+	if (len(sys.argv) < 4):
 		usage(sys.argv[0])
 		return
 	
-	path = os.path.abspath(sys.argv[1])
+	if (not sys.argv[1].isdigit()):
+		print "<EXTRA_BYTES> must be a number"
+		return
+	
+	extra_bytes = int(sys.argv[1])
+	
+	path = os.path.abspath(sys.argv[2])
 	if (not os.path.isdir(path)):
 		print "<PATH> must be a directory"
@@ -365,9 +371,9 @@
 	
 	# Make sure the filesystem is large enought for FAT16
-	size = subtree_size(path, cluster_size, dirent_size) + reserved_clusters * cluster_size
+	size = subtree_size(path, cluster_size, dirent_size) + reserved_clusters * cluster_size + extra_bytes
 	while (size / cluster_size < fat16_clusters):
 		if (cluster_size > sector_size):
 			cluster_size /= 2
-			size = subtree_size(path, cluster_size, dirent_size) + reserved_clusters * cluster_size
+			size = subtree_size(path, cluster_size, dirent_size) + reserved_clusters * cluster_size + extra_bytes
 		else:
 			size = fat16_clusters * cluster_size + reserved_clusters * cluster_size
@@ -381,5 +387,5 @@
 	data_start = root_start + root_size
 	
-	outf = file(sys.argv[2], "w")
+	outf = file(sys.argv[3], "w")
 	
 	boot_sector = xstruct.create(BOOT_SECTOR)