diff --git a/gdk-pixbuf/ChangeLog b/gdk-pixbuf/ChangeLog
index 7881c0bc56..2f51bd1064 100644
--- a/gdk-pixbuf/ChangeLog
+++ b/gdk-pixbuf/ChangeLog
@@ -1,3 +1,8 @@
+1999-12-03  Jonathan Blandford  <jrb@redhat.com>
+
+	* gdk-pixbuf/io-gif.c (gif_fill_in_lines): added a comment to
+	explain this function better.
+
 1999-12-02  Federico Mena Quintero  <federico@redhat.com>
 
 	Source files moved from src/ to gdk-pixbuf/, to be consistent with
diff --git a/gdk-pixbuf/io-gif.c b/gdk-pixbuf/io-gif.c
index b74a69a134..e5cef27db3 100644
--- a/gdk-pixbuf/io-gif.c
+++ b/gdk-pixbuf/io-gif.c
@@ -628,11 +628,15 @@ gif_fill_in_lines (GifContext *context, guchar *dest, guchar v)
 			gif_fill_in_pixels (context, dest, 3, v);
 			gif_fill_in_pixels (context, dest, 4, v);
 		}
+		/* we don't need a break here.  We draw the outer pixels first, then the
+		 * inner ones, then the innermost ones.  case 0 needs to draw all 3 bands.
+		 * case 1, just the last two, and case 2 just draws the last one*/
 	case 1:
 		if (context->draw_ypos > 2)
 			gif_fill_in_pixels (context, dest, -2, v);
 		if (context->draw_ypos < (context->frame_height - 2))
 			gif_fill_in_pixels (context, dest, 2, v);
+		/* no break as above. */
 	case 2:
 		if (context->draw_ypos > 1)
 			gif_fill_in_pixels (context, dest, -1, v);