--- mig.in.orig	2005-04-09 12:58:11.000000000 +0200
+++ mig.in	2005-04-09 13:01:30.000000000 +0200
@@ -93,7 +93,7 @@
 	-prefix | -subrprefix ) migflags="$migflags $1 $2"; shift; shift;;
 
 	-MD ) sawMD=1; cppflags="$cppflags $1"; shift;;
-	-imacros ) cppflags="$cppflags $1 $2"; shift; shift;;
+	-imacros | -isystem ) cppflags="$cppflags $1 $2"; shift; shift;;
 	-cc) cpp="$2"; shift; shift;;
 	-migcom) migcom="$2"; shift; shift;;
 	-* ) cppflags="$cppflags $1"; shift;;