diff --git a/crates/maestro-daemon/src/tmux.rs b/crates/maestro-daemon/src/tmux.rs
index 545c02f..f2bfc3b 100644
--- a/crates/maestro-daemon/src/tmux.rs
+++ b/crates/maestro-daemon/src/tmux.rs
@@ -278,6 +278,10 @@ impl Tmux {
                 "capture-pane",
                 "-p",
                 "-e",
+                // Keep trailing spaces, so a line's background colour reaches
+                // the edge instead of stopping at the last glyph and letting
+                // the client's own background show through.
+                "-N",
                 "-t",
                 &name,
                 "-S",