Avoid another checker warning.

1 files changed, 1 insertions, 1 deletions

diff --git a/io.c b/io.c
index 2c162a6e..7f023fce 100644
--- a/io.c
+++ b/io.c
@@ -776,7 +776,7 @@ static char *perform_io(size_t needed, int flags)
 			iobuf.in.len += n;
 		}
 
-		if (iobuf.out_fd >= 0 && FD_ISSET(iobuf.out_fd, &w_fds)) {
+		if (out && FD_ISSET(iobuf.out_fd, &w_fds)) {
 			size_t len = iobuf.raw_flushing_ends_before ? iobuf.raw_flushing_ends_before - out->pos : out->len;
 			int n;