diff --git a/docs/configuration.rst b/docs/configuration.rst
index 62880208f..dd1e6341c 100644
--- a/docs/configuration.rst
+++ b/docs/configuration.rst
@@ -257,6 +257,8 @@ PAPERLESS_OCR_LANGUAGE=<lang>
     languages enabled.
 
     Defaults to "eng".
+		
+		Note: If your language contains a '-' such as chi-sim, you must use chi_sim
 
 PAPERLESS_OCR_MODE=<mode>
     Tell paperless when and how to perform ocr on your documents. Four modes