diff --git a/include/sound/sof/topology.h b/include/sound/sof/topology.h
index 8f8d1cf649f2..6a6b4791eaf6 100644
--- a/include/sound/sof/topology.h
+++ b/include/sound/sof/topology.h
@@ -220,7 +220,7 @@ struct sof_ipc_comp_process {
 	/* reserved for future use */
 	uint32_t reserved[7];
 
-	unsigned char data[0];
+	uint8_t data[0];
 } __packed;
 
 /* frees components, buffers and pipelines