1 files changed, 8 insertions, 1 deletions

diff --git a/meta/classes/bootimg.bbclass b/meta/classes/bootimg.bbclass
index 17c329a142..b7ddf42427 100644
--- a/meta/classes/bootimg.bbclass
+++ b/meta/classes/bootimg.bbclass
@@ -163,8 +163,15 @@ build_hddimg() {
                 # done in blocks, thus the mod by 16 instead of 32.
                 BLOCKS=$(expr $BLOCKS + $(expr 16 - $(expr $BLOCKS % 16)))
 
+                # mkdosfs will sometimes use FAT16 when it is not appropriate,
+                # resulting in a boot failure from SYSLINUX. Use FAT32 for
+                # images larger than 512MB, otherwise let mkdosfs decide.
+                if [ $(expr $BLOCKS / 1024) -gt 512 ]; then
+                        FATSIZE="-F 32"
+                fi
+
                 IMG=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hddimg
-                mkdosfs -n ${BOOTIMG_VOLUME_ID} -S 512 -C ${IMG} ${BLOCKS}
+                mkdosfs ${FATSIZE} -n ${BOOTIMG_VOLUME_ID} -S 512 -C ${IMG} ${BLOCKS}
                 # Copy HDDDIR recursively into the image file directly
                 mcopy -i ${IMG} -s ${HDDDIR}/* ::/