diff --git a/modules/fc_optional.cmake b/modules/fc_optional.cmake
index aec0d7e..8019c08 100644
--- a/modules/fc_optional.cmake
+++ b/modules/fc_optional.cmake
@@ -26,14 +26,16 @@
 #
 #   FCFLAGS
 #
-# autocmake.cfg configuration::
+# autocmake.yml configuration::
 #
-#   docopt: --fc=<FC> Fortran compiler [default: gfortran].
-#           --extra-fc-flags=<EXTRA_FCFLAGS> Extra Fortran compiler flags [default: ''].
-#           --fc-support=<FC_SUPPORT> Toggle Fortran language support (ON/OFF) [default: ON].
-#   export: 'FC={0}'.format(arguments['--fc'])
-#   define: '-DEXTRA_FCFLAGS="{0}"'.format(arguments['--extra-fc-flags'])
-#           '-DENABLE_FC_SUPPORT="{0}"'.format(arguments['--fc-support'])
+#   docopt:
+#     - "--fc=<FC> Fortran compiler [default: gfortran]."
+#     - "--extra-fc-flags=<EXTRA_FCFLAGS> Extra Fortran compiler flags [default: '']."
+#     - "--fc-support=<FC_SUPPORT> Toggle Fortran language support (ON/OFF) [default: ON]."
+#   export: "'FC={0}'.format(arguments['--fc'])"
+#   define:
+#     - "'-DEXTRA_FCFLAGS=\"{0}\"'.format(arguments['--extra-fc-flags'])"
+#     - "'-DENABLE_FC_SUPPORT=\"{0}\"'.format(arguments['--fc-support'])"
 
 option(ENABLE_FC_SUPPORT "Enable Fortran language support" ON)