diff -urN eblook-1.5.1.ORIG/configure.in eblook-1.5.1/configure.in
--- eblook-1.5.1.ORIG/configure.in	2002-03-16 16:14:21.000000000 +0900
+++ eblook-1.5.1/configure.in	2004-01-04 01:21:08.526699688 +0900
@@ -33,6 +33,7 @@
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
+AC_C_PROTOTYPES
 AC_TYPE_OFF_T
 AC_TYPE_SIZE_T
 if test $ac_cv_type_size_t = yes ; then