diff --git a/src/frontends/qt4/GuiPainter.cpp b/src/frontends/qt4/GuiPainter.cpp
index f4bd49587c..fd2f96b39d 100644
--- a/src/frontends/qt4/GuiPainter.cpp
+++ b/src/frontends/qt4/GuiPainter.cpp
@@ -548,5 +548,24 @@ void GuiPainter::dashedUnderline(FontInfo const & f, int x, int y, int width)
 		line(x, y + below + n, x + width, y + below + n, f.realColor(), line_onoffdash);
 }
 
+
+void GuiPainter::wavyHorizontalLine(int x, int y, int width, ColorCode col)
+{
+	setQPainterPen(computeColor(col));
+	int const step = 4;
+	int const xend = x + width;
+	int height = 1;
+	//FIXME: I am not sure if Antialiasing gives the best effect.
+	//setRenderHint(Antialiasing, true);
+	while (x < xend) {
+		height = - height;
+		drawLine(x, y - height, x + step, y + height);
+		x += step;
+		drawLine(x, y + height, x + 2, y + height);
+		x += 2;
+	}
+	//setRenderHint(Antialiasing, false);
+}
+
 } // namespace frontend
 } // namespace lyx
diff --git a/src/frontends/qt4/GuiPainter.h b/src/frontends/qt4/GuiPainter.h
index fa87940d45..232798e11e 100644
--- a/src/frontends/qt4/GuiPainter.h
+++ b/src/frontends/qt4/GuiPainter.h
@@ -119,6 +119,8 @@ public:
 	virtual int preeditText(int x, int y,
 		char_type c, FontInfo const & f, preedit_style style);
 
+	void wavyHorizontalLine(int x, int y, int width, ColorCode col);
+
 private:
 	/// check the font, and if set, draw an underline
 	void underline(FontInfo const & f,