diff --git a/classes/obmc-phosphor-debug-tarball.bbclass b/classes/obmc-phosphor-debug-tarball.bbclass
index 0e5dbd2..a7d2dc4 100644
--- a/classes/obmc-phosphor-debug-tarball.bbclass
+++ b/classes/obmc-phosphor-debug-tarball.bbclass
@@ -1,7 +1,11 @@
+# IMAGE_FSTYPES must appear before image.bbclass
+# is inherited otherwise image.bbclass will inherit
+# "live" image fstypes that we don't want.
+IMAGE_FSTYPES = "tar.xz"
+
 inherit image
 inherit obmc-phosphor-license
 
-IMAGE_FSTYPES = "tar.xz"
 IMAGE_INSTALL_append = " busybox packagegroup-obmc-phosphor-debugtools"
 
 # Override from image_types.bbclass to restrict tarball to /usr tree.