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-rw-r--r--sys/src/cmd/nusb/cam/cam.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/src/cmd/nusb/cam/cam.c b/sys/src/cmd/nusb/cam/cam.c
index c2cc07eea..eabe10d2e 100644
--- a/sys/src/cmd/nusb/cam/cam.c
+++ b/sys/src/cmd/nusb/cam/cam.c
@@ -284,6 +284,8 @@ fsdestroyfid(Fid *fid)
{
ReadState *rs;
+ if(fid->omode == -1)
+ return;
rs = fid->aux;
if(rs != nil){
free(rs->buf);