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-rw-r--r--lib/interestingtimes.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/interestingtimes.c b/lib/interestingtimes.c
index 9cf84041..a1aa2b67 100644
--- a/lib/interestingtimes.c
+++ b/lib/interestingtimes.c
@@ -27,7 +27,7 @@ int terminal_size(unsigned *xx, unsigned *yy)
// stdin, stdout, stderr
for (i=0; i<3; i++) {
memset(&ws, 0, sizeof(ws));
- if (!ioctl(i, TIOCGWINSZ, &ws)) {
+ if (isatty(i) && !ioctl(i, TIOCGWINSZ, &ws)) {
if (ws.ws_col) x = ws.ws_col;
if (ws.ws_row) y = ws.ws_row;