diff --git a/lib/GfxRenderer/GfxRenderer.cpp b/lib/GfxRenderer/GfxRenderer.cpp
index 0f85a1b..7072fed 100644
--- a/lib/GfxRenderer/GfxRenderer.cpp
+++ b/lib/GfxRenderer/GfxRenderer.cpp
@@ -484,6 +484,7 @@ void GfxRenderer::drawButtonHints(const int fontId, const char* btn1, const char
     // Only draw if the label is non-empty
     if (labels[i] != nullptr && labels[i][0] != '\0') {
       const int x = buttonPositions[i];
+      fillRect(x, pageHeight - buttonY, buttonWidth, buttonHeight, false);
       drawRect(x, pageHeight - buttonY, buttonWidth, buttonHeight);
       const int textWidth = getTextWidth(fontId, labels[i]);
       const int textX = x + (buttonWidth - 1 - textWidth) / 2;