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-rw-r--r--xorg-server/os/io.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/xorg-server/os/io.c b/xorg-server/os/io.c
index f8354a6af..8a2207081 100644
--- a/xorg-server/os/io.c
+++ b/xorg-server/os/io.c
@@ -823,7 +823,7 @@ WriteToClient (ClientPtr who, int count, const void *__buf)
CARD32 replylen;
unsigned long bytesleft;
- replylen = ((xGenericReply *)buf)->length;
+ replylen = ((const xGenericReply *)buf)->length;
if (who->swapped)
swapl(&replylen);
bytesleft = (replylen * 4) + SIZEOF(xReply) - count - padBytes;