diff --git a/clients/cairo-util.c b/clients/cairo-util.c
index 5aa9857a..7bcfe414 100644
--- a/clients/cairo-util.c
+++ b/clients/cairo-util.c
@@ -262,3 +262,17 @@ tile_source(cairo_t *cr, cairo_surface_t *surface,
 			margin, height - margin - top_margin);
 	cairo_fill(cr);
 }
+
+void
+rounded_rect(cairo_t *cr, int x0, int y0, int x1, int y1, int radius)
+{
+	cairo_move_to(cr, x0, y0 + radius);
+	cairo_arc(cr, x0 + radius, y0 + radius, radius, M_PI, 3 * M_PI / 2);
+	cairo_line_to(cr, x1 - radius, y0);
+	cairo_arc(cr, x1 - radius, y0 + radius, radius, 3 * M_PI / 2, 2 * M_PI);
+	cairo_line_to(cr, x1, y1 - radius);
+	cairo_arc(cr, x1 - radius, y1 - radius, radius, 0, M_PI / 2);
+	cairo_line_to(cr, x0 + radius, y1);
+	cairo_arc(cr, x0 + radius, y1 - radius, radius, M_PI / 2, M_PI);
+	cairo_close_path(cr);
+}
diff --git a/clients/cairo-util.h b/clients/cairo-util.h
index f28ac5f1..257489a2 100644
--- a/clients/cairo-util.h
+++ b/clients/cairo-util.h
@@ -34,4 +34,7 @@ void
 tile_source(cairo_t *cr, cairo_surface_t *surface,
 	    int x, int y, int width, int height, int margin, int top_margin);
 
+void
+rounded_rect(cairo_t *cr, int x0, int y0, int x1, int y1, int radius);
+
 #endif
diff --git a/clients/window.c b/clients/window.c
index 4b712f81..48b444aa 100644
--- a/clients/window.c
+++ b/clients/window.c
@@ -172,20 +172,6 @@ static const GOptionEntry xkb_option_entries[] = {
 	{ NULL }
 };
 
-static void
-rounded_rect(cairo_t *cr, int x0, int y0, int x1, int y1, int radius)
-{
-	cairo_move_to(cr, x0, y0 + radius);
-	cairo_arc(cr, x0 + radius, y0 + radius, radius, M_PI, 3 * M_PI / 2);
-	cairo_line_to(cr, x1 - radius, y0);
-	cairo_arc(cr, x1 - radius, y0 + radius, radius, 3 * M_PI / 2, 2 * M_PI);
-	cairo_line_to(cr, x1, y1 - radius);
-	cairo_arc(cr, x1 - radius, y1 - radius, radius, 0, M_PI / 2);
-	cairo_line_to(cr, x0 + radius, y1);
-	cairo_arc(cr, x0 + radius, y1 - radius, radius, M_PI / 2, M_PI);
-	cairo_close_path(cr);
-}
-
 static const cairo_user_data_key_t surface_data_key;
 struct surface_data {
 	struct wl_buffer *buffer;