diff --git a/kitty/screen.c b/kitty/screen.c
index 04c4af3d1..5d8658847 100644
--- a/kitty/screen.c
+++ b/kitty/screen.c
@@ -772,7 +772,7 @@ checked_range_line(Screen *self, int y) {
 
 static bool
 range_line_is_continued(Screen *self, int y) {
-    if (-(int)self->historybuf->count <= y && y < (int)self->lines) return false;
+    if (!(-(int)self->historybuf->count <= y && y < (int)self->lines)) return false;
     if (y < 0) return historybuf_is_line_continued(self->historybuf, -(y + 1));
     return visual_line_is_continued(self, y);
 }
diff --git a/kitty_tests/screen.py b/kitty_tests/screen.py
index 2a1133a65..4111baa11 100644
--- a/kitty_tests/screen.py
+++ b/kitty_tests/screen.py
@@ -1193,6 +1193,14 @@ class TestScreen(BaseTest):
             s.cmd_output(2, a.append)
             return ''.join(a)
 
+        s = self.create_screen(cols=5, lines=5, scrollback=15)
+        draw_prompt('P' * s.columns)
+        draw_output(s.lines + 1, 'a')  # ensure prompt is in scrollback
+        draw_prompt('Q' * s.columns)
+        draw_output(s.lines + 1, 'b')  # ensure prompt is in scrollback
+        draw_prompt('R' * s.columns)
+        self.ae(lco(), '0b\n1b\n2b\n3b\n4b\n5b')
+
         s = self.create_screen()
         s.draw('abcd'), s.index(), s.carriage_return()
         s.draw('12'), s.index(), s.carriage_return()