diff --git a/build/jam/ImageRules b/build/jam/ImageRules
index 9589468d71..28c5f7f6fc 100644
--- a/build/jam/ImageRules
+++ b/build/jam/ImageRules
@@ -1506,17 +1506,26 @@ rule BuildFloppyBootImage image : haikuLoader : archive
 actions BuildFloppyBootImage1
 {
 	haiku_loader_size=`stat -c %s "$(>[1])"`
+	drivers_tgz_size=`stat -c %s "$(>[2])"`
 	if [ $? -ne 0 ] ; then
 		# FreeBSD's stat command don't support -c/--format option
 		# and use %z specifier for file size
 		haiku_loader_size=`stat -f %z "$(>[1])"`
+		drivers_tgz_size=`stat -f %z "$(>[2])"`
 	fi
 	archive_image_offset=`echo "$(ARCHIVE_IMAGE_OFFSET) * 1024" | bc`
+	floppy_tgz_size=\
+		`echo "($(FLOPPY_IMAGE_SIZE) - $(ARCHIVE_IMAGE_OFFSET)) * 1024" | bc`
 	if [ $haiku_loader_size -gt $archive_image_offset ] ; then
 		echo "Error: $(>[1]) is too big ($haiku_loader_size) to fit "
 		echo "       before the boot archive starting at $archive_image_offset!"
 		exit 1
 	fi
+	if [ $drivers_tgz_size -gt $floppy_tgz_size ] ; then
+		echo "Error: $(>[2]) is too big ($drivers_tgz_size) to fit "
+		echo "       in the boot floppy ($floppy_tgz_size)!"
+		exit 1
+	fi
 	$(RM) $(<)
 	# make an empty image
 	dd if=/dev/zero of=$(<) bs=1k count=$(FLOPPY_IMAGE_SIZE)