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-rw-r--r--sys/dev/sio/sio.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/dev/sio/sio.c b/sys/dev/sio/sio.c
index 0e6329db72c9..d0797c6a48f1 100644
--- a/sys/dev/sio/sio.c
+++ b/sys/dev/sio/sio.c
@@ -31,10 +31,12 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
- * $Id: sio.c,v 1.131 1995/12/29 12:50:54 bde Exp $
+ * $Id: sio.c,v 1.132 1995/12/30 03:52:58 bde Exp $
*/
#include "sio.h"
+#include "opt_ddb.h"
+
/*
* Serial driver, based on 386BSD-0.1 com driver.
* Mostly rewritten to use pseudo-DMA.