--- a/meta/classes-recipe/kernel-fitimage.bbclass
+++ b/meta/classes-recipe/kernel-fitimage.bbclass
@@ -65,7 +65,7 @@ python __anonymous () {
                 fit_assemble_task = 'do_deploy_fitimage_unbundled'
                 bb.build.addtask(fit_assemble_task, 'do_build', 'do_deploy', d)
                 bb.build.addtask(fit_assemble_task + '_setscene', '', '', d)
-                d.appendVar('SSTATETASKS', fit_assemble_task)
+                d.appendVar('SSTATETASKS', ' ' + fit_assemble_task)

Summary:
If the KERNEL_IMAGETYPES(S) contains fitImage, the kernel is always