diff --git a/SConstruct b/SConstruct
index f7ef5b89d..6efbd5e05 100644
--- a/SConstruct
+++ b/SConstruct
@@ -490,7 +490,8 @@ config_options = [
     BoolVariable(
         'lapack_ftn_string_len_at_end',
         """Controls whether the LAPACK functions have the string length
-           at the end in the Fortran libraries.""",
+           argument at the end of the argument list ('yes') or after
+           each argument ('no') in the Fortran libraries.""",
         True),
     EnumVariable(
         'system_googletest',
diff --git a/doc/sphinx/compiling/config-options.rst b/doc/sphinx/compiling/config-options.rst
index 137338b22..9f88895ae 100644
--- a/doc/sphinx/compiling/config-options.rst
+++ b/doc/sphinx/compiling/config-options.rst
@@ -326,7 +326,8 @@ Options List
 
 * ``lapack_ftn_string_len_at_end``: [ ``yes`` | ``no`` ]
     Controls whether the LAPACK functions have the string length
-    at the end in the Fortran libraries.
+    argument at the end of the argument list (``yes``) or after
+    each argument (``no``) in the Fortran libraries.
     - default: 'yes'
 
 .. _system-googletest: