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-rw-r--r--Src/utils.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/Src/utils.c b/Src/utils.c
index d38babbe4..47d99442d 100644
--- a/Src/utils.c
+++ b/Src/utils.c
@@ -2300,8 +2300,8 @@ read_poll(int fd, int *readchar, int polltty, zlong microseconds)
     struct ttyinfo ti;
 #endif
 
-     if (fd < 0)
-	 polltty = 0;		/* no tty to poll */
+    if (fd < 0 || (polltty && !isatty(fd)))
+	polltty = 0;		/* no tty to poll */
 
 #if defined(HAS_TIO) && !defined(__CYGWIN__)
     /*