diff --git a/src/configure.in b/src/configure.in
index 96a96d97a8d881eecef611f69302d932afdc4d63..1f6e562a3eac2644de668aeec354e14ec8b86ec8 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -1,4 +1,4 @@
-AC_REVISION("$Id: configure.in,v 1.138 1997/11/30 20:09:48 grubba Exp $")
+AC_REVISION("$Id: configure.in,v 1.139 1997/12/02 23:21:33 grubba Exp $")
 AC_INIT(interpret.c)
 AC_CONFIG_HEADER(machine.h)
 
@@ -597,6 +597,8 @@ AC_CHECK_LIB(nsl, gethostbyname)
 AC_CHECK_LIB(dl, dlopen)
 AC_CHECK_LIB(dld, dld_link)
 
+AC_HAVE_FUNCS(strdup)
+
 
 if test "${pike_cv_sys_os}" = "Linux"; then
   if test "${ac_cv_lib_m_floor}" = "no"; then