diff --git a/io_mesh_uv_layout/export_uv_png.py b/io_mesh_uv_layout/export_uv_png.py
index f831402fdd8327b86e254a2fbcd3c9831eb240e7..7fd3ba09e82fad1d440c847eaf65fe23effff37a 100644
--- a/io_mesh_uv_layout/export_uv_png.py
+++ b/io_mesh_uv_layout/export_uv_png.py
@@ -30,6 +30,7 @@ def export(filepath, face_data, colors, width, height, opacity):
     offscreen.bind()
 
     try:
+        bgl.glClearColor(0.0, 0.0, 0.0, 0.0)
         bgl.glClear(bgl.GL_COLOR_BUFFER_BIT)
         draw_image(face_data, opacity)