diff --git a/src/include/uapi/abi.h b/src/include/uapi/abi.h
index e5f58c045..bd14f6a22 100644
--- a/src/include/uapi/abi.h
+++ b/src/include/uapi/abi.h
@@ -52,7 +52,7 @@
 
 /** \brief SOF ABI version major, minor and patch numbers */
 #define SOF_ABI_MAJOR 3
-#define SOF_ABI_MINOR 2
+#define SOF_ABI_MINOR 3
 #define SOF_ABI_PATCH 0
 
 /** \brief SOF ABI version number. Format within 32bit word is MMmmmppp */
diff --git a/src/include/uapi/ipc/control.h b/src/include/uapi/ipc/control.h
index 71ebf2a17..c43dc9b32 100644
--- a/src/include/uapi/ipc/control.h
+++ b/src/include/uapi/ipc/control.h
@@ -150,9 +150,12 @@ struct sof_ipc_ctrl_data {
 	/* control data - can either be appended or DMAed from host */
 	struct sof_ipc_host_buffer buffer;
 	uint32_t num_elems;	/**< in array elems or bytes for data type */
+	uint32_t elems_remaining;	/**< elems remaining if sent in parts */
+
+	uint32_t msg_index;	/**< index for large messages sent in parts */
 
 	/* reserved for future use */
-	uint32_t reserved[8];
+	uint32_t reserved[6];
 
 	/* control data - add new types if needed */
 	union {