diff --git a/reactos/sdk/include/ddk/ata.h b/reactos/sdk/include/ddk/ata.h
index fe6809f19eb..56b44d55c04 100644
--- a/reactos/sdk/include/ddk/ata.h
+++ b/reactos/sdk/include/ddk/ata.h
@@ -252,6 +252,7 @@ typedef struct _IDENTIFY_DEVICE_DATA {
 } IDENTIFY_DEVICE_DATA, *PIDENTIFY_DEVICE_DATA;
 #include <poppack.h>
 
-#define IDE_COMMAND_IDENTIFY 0xEC
+#define IDE_COMMAND_FLUSH_CACHE 0xE7
+#define IDE_COMMAND_IDENTIFY    0xEC
 
 #endif