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-rw-r--r--sys/src/cmd/jpg/writejpg.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/src/cmd/jpg/writejpg.c b/sys/src/cmd/jpg/writejpg.c
index 9a3439ce0..737f44780 100644
--- a/sys/src/cmd/jpg/writejpg.c
+++ b/sys/src/cmd/jpg/writejpg.c
@@ -878,6 +878,8 @@ writejpg0(Biobuf *fd, Image *image, Memimage *memimage,
case GREY2:
case GREY4:
case GREY8:
+ gflag = 1;
+ break;
case RGB24:
break;
default: