diff --git a/meta/classes-recipe/qemuboot.bbclass b/meta/classes-recipe/qemuboot.bbclass
index 895fd38d68..0f80c60ab5 100644
--- a/meta/classes-recipe/qemuboot.bbclass
+++ b/meta/classes-recipe/qemuboot.bbclass
@@ -129,7 +129,8 @@ addtask do_write_qemuboot_conf after do_rootfs before do_image
 
 def qemuboot_vars(d):
     build_vars = ['MACHINE', 'TUNE_ARCH', 'DEPLOY_DIR_IMAGE',
-                'KERNEL_IMAGETYPE', 'IMAGE_NAME', 'IMAGE_LINK_NAME',
+                'KERNEL_IMAGETYPE', 'KERNEL_IMAGE_NAME',
+                'KERNEL_IMAGE_BIN_EXT', 'IMAGE_NAME', 'IMAGE_LINK_NAME',
                 'STAGING_DIR_NATIVE', 'STAGING_BINDIR_NATIVE',
                 'STAGING_DIR_HOST', 'SERIAL_CONSOLES', 'UNINATIVE_LOADER']
     return build_vars + [k for k in d.keys() if k.startswith('QB_')]