diff --git a/src/tui/tcell.go b/src/tui/tcell.go
index af0902cb..9b8f8620 100644
--- a/src/tui/tcell.go
+++ b/src/tui/tcell.go
@@ -561,7 +561,11 @@ func fill(x, y, w, h int, n ColorPair, r rune) {
 }
 
 func (w *TcellWindow) Erase() {
-	fill(w.left-1, w.top, w.width+1, w.height-1, w.normal, ' ')
+	if w.borderStyle.shape.HasLeft() {
+		fill(w.left-1, w.top, w.width, w.height-1, w.normal, ' ')
+	} else {
+		fill(w.left, w.top, w.width-1, w.height-1, w.normal, ' ')
+	}
 	w.drawBorder(false)
 }
 
diff --git a/src/tui/tui.go b/src/tui/tui.go
index aec80fcd..7fad8f48 100644
--- a/src/tui/tui.go
+++ b/src/tui/tui.go
@@ -368,6 +368,14 @@ const (
 	BorderRight
 )
 
+func (s BorderShape) HasLeft() bool {
+	switch s {
+	case BorderNone, BorderRight, BorderTop, BorderBottom, BorderHorizontal: // No Left
+		return false
+	}
+	return true
+}
+
 func (s BorderShape) HasRight() bool {
 	switch s {
 	case BorderNone, BorderLeft, BorderTop, BorderBottom, BorderHorizontal: // No right