diff --git a/configure.ac b/configure.ac
index 10acaba0..a105f3c6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -911,6 +911,9 @@ AC_CHECK_FUNCS([gettimeofday],
 AC_CHECK_FUNCS([strptime],
         [AM_CONDITIONAL([HAVE_STRPTIME], true)],
         [AM_CONDITIONAL([HAVE_STRPTIME], false)])
+AC_CHECK_FUNCS([getentropy],
+        [AM_CONDITIONAL([HAVE_GETENTROPY], true)],
+        [AM_CONDITIONAL([HAVE_GETENTROPY], false)])
 AC_CHECK_FUNCS([daemon], [have_daemon=yes])
 AM_CONDITIONAL([HAVE_DAEMON], [test "x$have_daemon" = "xyes"])