diff --git a/src/attach.rs b/src/attach.rs
index bec20b0..c1cf22f 100644
--- a/src/attach.rs
+++ b/src/attach.rs
@@ -133,16 +133,15 @@ fn adjust_scroll(input: &str, cursor: usize, scroll: &mut usize, cols: usize) {
     if max_visible == 0 {
         return;
     }
-    let threshold = (max_visible as f64 * 0.9) as usize;
     let nchars = input.chars().count();
 
-    if cursor > *scroll + threshold {
-        *scroll = cursor - threshold;
+    if cursor >= *scroll + max_visible {
+        *scroll = cursor + 1 - max_visible;
     }
     if cursor < *scroll {
         *scroll = cursor;
     }
-    if cursor < *scroll + threshold && *scroll + max_visible > nchars {
+    if *scroll + max_visible > nchars {
         *scroll = nchars.saturating_sub(max_visible);
     }
 }