diff --git a/subprojects/gst-devtools/docs/gst-validate-environment-variables.md b/subprojects/gst-devtools/docs/gst-validate-environment-variables.md
index 6cf48f9c3c..42de2bfa1f 100644
--- a/subprojects/gst-devtools/docs/gst-validate-environment-variables.md
+++ b/subprojects/gst-devtools/docs/gst-validate-environment-variables.md
@@ -35,6 +35,16 @@ outputed into the standard error.
 
 You can use the special names `stdout` and `stderr` to use those output.
 
+**GST_VALIDATE_PLUGIN_PATH.**
+
+Set this variable to a colon-separated list of paths. GstValidate will
+scan these paths for GstPlugin files and add them to the GstRegistry.
+By default GstValidate will look for plugins in the user data directory
+specified in the [XDG standard]:
+`.local/share/gstreamer-GST_API_VERSION/plugins` and the
+system wide user data directory:
+`/usr/lib/gstreamer-GST_API_VERSION/validate`
+
 **GST_VALIDATE_SCENARIOS_PATH.**
 
 Set this variable to a colon-separated list of paths. GstValidate will