diff --git a/src/compress.c b/src/compress.c

index 2b05352..ccb1cfd 100644

--- a/src/compress.c

+++ b/src/compress.c

@@ -183,7 +183,7 @@ sread(int fd, void *buf, size_t n, int canbepipe __attribute__ ((unused)))

 		goto nocheck;

 #ifdef FIONREAD

-	if ((canbepipe && (ioctl(fd, FIONREAD, &t) == -1)) || (t == 0)) {

+	if (canbepipe && ((ioctl(fd, FIONREAD, &t) == -1) || (t == 0))) {

 #ifdef FD_ZERO

 		for (cnt = 0;; cnt++) {

 			fd_set check;