diff --git a/src/option.c b/src/option.c
index e49d932..756d918 100644
--- a/src/option.c
+++ b/src/option.c
@@ -1624,6 +1624,9 @@
     {"open",	    NULL,   P_BOOL|P_VI_DEF,
 			    (char_u *)NULL, PV_NONE,
 			    {(char_u *)FALSE, (char_u *)0L}},
+    {"operatorfunc", "opfunc", P_STRING|P_VI_DEF|P_SECURE,
+			    (char_u *)&p_opfunc, PV_NONE,
+			    {(char_u *)"", (char_u *)0L} },
     {"optimize",    "opt",  P_BOOL|P_VI_DEF,
 			    (char_u *)NULL, PV_NONE,
 			    {(char_u *)FALSE, (char_u *)0L}},