diff --git a/src/include/kernel/ext_manifest.h b/src/include/kernel/ext_manifest.h
index 4963428733ae..e7d7121cd91d 100644
--- a/src/include/kernel/ext_manifest.h
+++ b/src/include/kernel/ext_manifest.h
@@ -47,6 +47,7 @@ enum ext_man_elem_type {
 
 /* EXT_MAN_ELEM_CONFIG_DATA elements identificators */
 enum config_elem_type {
+	EXT_MAN_CONFIG_EMPTY		= 0,
 	EXT_MAN_CONFIG_IPC_MSG_SIZE	= 1,
 	EXT_MAN_CONFIG_MEMORY_USAGE_SCAN = 2, /**< ABI3.18 */
 	EXT_MAN_CONFIG_LAST_ELEM,	/**< keep it at the end of enum list */
diff --git a/src/platform/intel/cavs/include/cavs/ext_manifest.h b/src/platform/intel/cavs/include/cavs/ext_manifest.h
index 305b29463273..fe185849f7fb 100644
--- a/src/platform/intel/cavs/include/cavs/ext_manifest.h
+++ b/src/platform/intel/cavs/include/cavs/ext_manifest.h
@@ -12,6 +12,7 @@
 
 /* EXT_MAN_ELEM_PLATFORM_CONFIG_DATA elements identificators */
 enum cavs_config_elem_type {
+	EXT_MAN_CAVS_CONFIG_EMPTY	= 0,
 	EXT_MAN_CAVS_CONFIG_LPRO	= 1,
 	EXT_MAN_CAVS_CONFIG_OUTBOX_SIZE,
 	EXT_MAN_CAVS_CONFIG_INBOX_SIZE,