--- enscript-1.6.6/configure.ac.orig	2012-09-30 21:24:45.567496718 +0200
+++ enscript-1.6.6/configure.ac	2012-09-30 21:41:38.907475597 +0200
@@ -11,7 +11,7 @@
 AC_PROG_CC
 
 AC_USE_SYSTEM_EXTENSIONS
-AM_C_PROTOTYPES
+CPPFLAGS="$CPPFLAGS -DPROTOTYPES"
 
 AC_C_CONST
 AC_FUNC_ALLOCA