diff --git a/meta-arm/recipes-security/optee-ftpm/optee-os_%.bbappend b/meta-arm/recipes-security/optee-ftpm/optee-os_%.bbappend
index acea7502..40423615 100644
--- a/meta-arm/recipes-security/optee-ftpm/optee-os_%.bbappend
+++ b/meta-arm/recipes-security/optee-ftpm/optee-os_%.bbappend
@@ -7,7 +7,8 @@ DEPENDS:append = "\
                  '' , \
                  d)}"
 
-EXTRA_OEMAKE:append = "${@bb.utils.contains('MACHINE_FEATURES', \
+EXTRA_OEMAKE:append = "\
+                       ${@bb.utils.contains('MACHINE_FEATURES', \
                       'optee-ftpm', \
                       'CFG_EARLY_TA=y EARLY_TA_PATHS="${STAGING_DIR_TARGET}/lib/optee_armtz/${FTPM_UUID}.stripped.elf"', \
                       '', \