1 files changed, 1 insertions, 1 deletions

diff --git a/src/firemon/top.c b/src/firemon/top.c
index fc6e6289e..55a35d93d 100644
--- a/src/firemon/top.c
+++ b/src/firemon/top.c
@@ -274,7 +274,7 @@ void top(void) {
                 struct winsize sz;
                 int row = 24;
                 int col = 80;
-                if (!ioctl(0, TIOCGWINSZ, &sz)) {
+                if (!ioctl(STDIN_FILENO, TIOCGWINSZ, &sz)) {
                         col = sz.ws_col;
                         row = sz.ws_row;
                 }