diff --git a/bootstrap.conf b/bootstrap.conf
index 783b3a3da7..0db6b62d5f 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -120,6 +120,7 @@ time_r
 timegm
 ttyname_r
 uname
+unsetenv
 useless-if-before-free
 usleep
 vasprintf