diff --git a/website/source/docs/other/environmental-variables.html.md b/website/source/docs/other/environmental-variables.html.md
index ecacc7053..a49e2c889 100644
--- a/website/source/docs/other/environmental-variables.html.md
+++ b/website/source/docs/other/environmental-variables.html.md
@@ -14,6 +14,33 @@ Vagrant has a set of environmental variables that can be used to
 configure and control it in a global way. This page lists those environmental
 variables.
 
+## CFLAGS
+
+If set the contents of this environment variable will be appended to the
+value generated by the Vagrant launcher.
+
+## CPPFLAGS
+
+If set the contents of this environment variable will be appended to the
+value generated by the Vagrant launcher.
+
+## CURL_CA_BUNDLE
+
+If set this environment variable will be passed through to the Vagrant
+process. By default Vagrant will use the CA certificate included with
+the Vagrant installation.
+
+## LDFLAGS
+
+If set the contents of this environment variable will be appended to the
+value generated by the Vagrant launcher.
+
+## SSL_CERT_FILE
+
+If set this environment variable will be passed through to the Vagrant
+process. By default Vagrant will use the CA certificate included with
+the Vagrant installation.
+
 ## `VAGRANT_ALIAS_FILE`
 
 `VAGRANT_ALIAS_FILE` can be set to change the file where Vagrant aliases are