diff --git a/bootstrap.conf b/bootstrap.conf
index 1d80640c0a..c93daf5a8d 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -88,7 +88,6 @@ ttyname_r
 uname
 unsetenv
 verify
-vsnprintf
 waitpid
 warnings
 wcwidth