diff --git a/meta-arm-bsp/recipes-security/optee/optee-os_corstone1000.inc b/meta-arm-bsp/recipes-security/optee/optee-os_corstone1000.inc
index 8e13d50..eb5f6df 100644
--- a/meta-arm-bsp/recipes-security/optee/optee-os_corstone1000.inc
+++ b/meta-arm-bsp/recipes-security/optee/optee-os_corstone1000.inc
@@ -14,6 +14,7 @@ SP_MKFILE_PATH += "${TS_INSTALL_PREFIX}/lib/make/smm-gateway.mk"
 
 EXTRA_OEMAKE += "'CFG_SP_MKFILE_PATH=${SP_MKFILE_PATH}'"
 
-SRC_URI:append = " file://sp_manifest_combined_se.dts;subdir=${S}"
-EMBED_DTB_SOURCE_FILE = "${S}/sp_manifest_combined_se.dts"
 EXTRA_OEMAKE += "CFG_EMBED_DTB_SOURCE_FILE=${EMBED_DTB_SOURCE_FILE}"
+
+SRC_URI:append = " file://sp_manifest_combined_se.dts;"
+EMBED_DTB_SOURCE_FILE = "${WORKDIR}/sp_manifest_combined_se.dts"