diff --git a/man/hbal.rst b/man/hbal.rst
index 0c50d995fd64ab18b965cfda6c3bbbb5e267866c..43f8bcefc15df025a376c1dfbb0b22ecdf6ff996 100644
--- a/man/hbal.rst
+++ b/man/hbal.rst
@@ -39,7 +39,7 @@ Reporting options:
 **[ -C[ *file* ] ]**
 **[ -p[ *fields* ] ]**
 **[ \--print-instances ]**
-**[ -o ]**
+**[ -S *file* ]**
 **[ -v... | -q ]**