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;