diff --git a/website/source/docs/internals/debugging.html.md b/website/source/docs/internals/debugging.html.md
index e10a218806..7aa5fe25ec 100644
--- a/website/source/docs/internals/debugging.html.md
+++ b/website/source/docs/internals/debugging.html.md
@@ -8,7 +8,9 @@ description: |-
 
 # Debugging Terraform
 
-Terraform has detailed logs which can be enabled by setting the TF_LOG environmental variable to any value. This will cause detailed logs to appear on stderr.
+Terraform has detailed logs which can be enabled by setting the `TF_LOG` environmental variable to any value. This will cause detailed logs to appear on stderr.
+
+You can set `TF_LOG` to one of the log levels `TRACE`, `DEBUG`, `INFO`, `WARN` or `ERROR` to change the verbosity of the logs. `TRACE` is the most verbose and it is the default if `TF_LOG` is set to something other than a log level name.
 
 To persist logged output you can set TF_LOG_PATH in order to force the log to always go to a specific file when logging is enabled. Note that even when TF_LOG_PATH is set, TF_LOG must be set in order for any logging to be enabled.