Index: enscript/configure.ac
===================================================================
--- enscript.orig/configure.ac	2017-08-10 12:01:11.267738765 -0400
+++ enscript/configure.ac	2017-08-10 12:01:25.319584336 -0400
@@ -11,7 +11,7 @@
 AC_PROG_CC
 
 AC_USE_SYSTEM_EXTENSIONS
-AM_C_PROTOTYPES
+AC_C_PROTOTYPES
 
 AC_C_CONST
 AC_FUNC_ALLOCA
