diff --git a/README.md b/README.md
index b06ffa3..08b7d14 100644
--- a/README.md
+++ b/README.md
@@ -2435,7 +2435,7 @@ def main(screen):
         ch = screen.getch()
         selected += (ch == KEY_DOWN) - (ch == KEY_UP)
         selected = max(0, min(len(paths)-1, selected))
-        first += (first <= selected - height) - (first > selected)
+        first += (selected >= first + height) - (selected < first)
         if ch in [KEY_LEFT, KEY_RIGHT, KEY_ENTER, 10, 13]:
             new_dir = '..' if ch == KEY_LEFT else paths[selected]
             if os.path.isdir(new_dir):
diff --git a/index.html b/index.html
index 5db7fc4..8bbd5e7 100644
--- a/index.html
+++ b/index.html
@@ -1997,7 +1997,7 @@ print(table)
         ch = screen.getch()
         selected += (ch == KEY_DOWN) - (ch == KEY_UP)
         selected = max(<span class="hljs-number">0</span>, min(len(paths)<span class="hljs-number">-1</span>, selected))
-        first += (first &lt;= selected - height) - (first &gt; selected)
+        first += (selected &gt;= first + height) - (selected &lt; first)
         <span class="hljs-keyword">if</span> ch <span class="hljs-keyword">in</span> [KEY_LEFT, KEY_RIGHT, KEY_ENTER, <span class="hljs-number">10</span>, <span class="hljs-number">13</span>]:
             new_dir = <span class="hljs-string">'..'</span> <span class="hljs-keyword">if</span> ch == KEY_LEFT <span class="hljs-keyword">else</span> paths[selected]
             <span class="hljs-keyword">if</span> os.path.isdir(new_dir):