diff --git a/configure.in b/configure.in
index d6ce31e5..e80e7d95 100644
--- a/configure.in
+++ b/configure.in
@@ -27,7 +27,7 @@ AC_USG
 
 AC_SUBST(LIBOBJS)
 
-AC_HAVE_FUNCS(getdtablesize sys_siglist _sys_siglist \
+AC_HAVE_FUNCS(getdtablesize sys_siglist _sys_siglist psignal \
 	      dup2 getcwd sigsetmask getgroups setlinebuf \
 	      setreuid setregid)
 AC_ALLOCA