diff --git a/include/flash.h b/include/flash.h
index b3ad235..a67e64c 100644
--- a/include/flash.h
+++ b/include/flash.h
@@ -445,6 +445,7 @@
 	uintptr_t physical_registers;
 	chipaddr virtual_registers;
 	union {
+		struct master_common *common;
 		struct par_master *par;
 		struct spi_master *spi;
 		struct opaque_master *opaque;