diff --git a/lib/param/wscript_build b/lib/param/wscript_build
index e5847b95606..1b26c5b141f 100644
--- a/lib/param/wscript_build
+++ b/lib/param/wscript_build
@@ -4,7 +4,7 @@ bld.SAMBA_GENERATOR('param_functions.c',
                     source= '../../script/generate_param.py ../../docs-xml/smbdotconf/parameters.all.xml',
                     target='param_functions.c',
                     group='build_source',
-                    rule='${PYTHON} ${SRC[0].abspath(env)} --file ${SRC[1].abspath(env)} --output ${TGT}')
+                    rule='${PYTHON} ${SRC[0].abspath(env)} --file ${SRC[1].abspath(env)} --output ${TGT} --mode=FUNCTIONS')
 
 bld.SAMBA_GENERATOR('param_local_h',
                     source= '../../script/mkparamdefs.pl loadparm.c param_functions.c ',