--- configure.orig	2008-07-22 21:46:45.000000000 +0200
+++ configure	2008-07-22 21:47:36.000000000 +0200
@@ -22253,8 +22253,8 @@
   done
 done
  ;;
-    "set_aa":C) sed 's/\(\/\*CANVASBASE\*\/\).*/\1Gnome::Canvas::CanvasAA/' -i $srcdir/flowcanvas/Canvas.hpp ;;
-    "set_no_aa":C) sed 's/\(\/\*CANVASBASE\*\/\).*/\1Gnome::Canvas::Canvas/' -i $srcdir/flowcanvas/Canvas.hpp ;;
+    "set_aa":C) sed -i '' 's/\(\/\*CANVASBASE\*\/\).*/\1Gnome::Canvas::CanvasAA/' $srcdir/flowcanvas/Canvas.hpp ;;
+    "set_no_aa":C) sed -i '' 's/\(\/\*CANVASBASE\*\/\).*/\1Gnome::Canvas::Canvas/' $srcdir/flowcanvas/Canvas.hpp ;;
 
   esac
 done # for ac_tag