diff --git a/configure.in b/configure.in
new file mode 100644
index 00000000..a8eb98a2
--- /dev/null
+++ b/configure.in
@@ -0,0 +1,12 @@
+dnl Process this file with autoconf to produce a configure script.
+AC_INIT(reduce.c)
+AC_PROG_CC
+AC_PROG_CPP
+AC_PROG_INSTALL
+AC_MINIX
+AC_ISC_POSIX
+AC_STDC_HEADERS
+AC_HAVE_HEADERS(string.h stdlib.h memory.h)
+AC_HAVE_FUNCS(strerror)
+AC_ALLOCA
+AC_OUTPUT(Makefile)