diff --git a/conf/machine/pengwyn.conf b/conf/machine/pengwyn.conf
index d458444..048f08f 100644
--- a/conf/machine/pengwyn.conf
+++ b/conf/machine/pengwyn.conf
@@ -6,7 +6,8 @@ require conf/machine/include/ti33x.inc
 
 IMAGE_CLASSES += "sdcard_image-pengwyn"
 
-IMAGE_FSTYPES = "tar.bz2 ext4"
+IMAGE_FSTYPES = "tar.bz2 ext4 wic"
+WKS_FILE ?= "pengwyn-yocto.wks.in"
 
 # Normally AM335 boards use ttyS0, but ICE uses ttyS3, so try both
 SERIAL_CONSOLES = "115200;ttyS0 115200;ttyO0 115200;ttyAMA0"
@@ -111,4 +112,4 @@ IMAGE_BOOT_FILES = " \
                      devicetree/am335x-pengwyn.dtb \
                    "
 
-RM_WORK_EXCLUDE += "u-boot-ti-staging linux-ti-staging "
+RM_WORK_EXCLUDE += "u-boot-ti-staging linux-ti-staging"