diff --git a/poky/scripts/lib/wic/canned-wks/sdimage-bootpart.wks b/poky/scripts/lib/wic/canned-wks/sdimage-bootpart.wks
index 7ffd632..63bc4da 100644
--- a/poky/scripts/lib/wic/canned-wks/sdimage-bootpart.wks
+++ b/poky/scripts/lib/wic/canned-wks/sdimage-bootpart.wks
@@ -2,5 +2,5 @@
 # long-description: Creates a partitioned SD card image. Boot files
 # are located in the first vfat partition.
 
-part /boot --source bootimg-partition --ondisk mmcblk --fstype=vfat --label boot --active --align 4 --size 16
-part / --source rootfs --ondisk mmcblk --fstype=ext4 --label root --align 4
+part /boot --source bootimg-partition --ondisk mmcblk0 --fstype=vfat --label boot --active --align 4 --size 16
+part / --source rootfs --ondisk mmcblk0 --fstype=ext4 --label root --align 4