diff --git a/src/optiondefs.h b/src/optiondefs.h
index 3621635..b6b5d49 100644
--- a/src/optiondefs.h
+++ b/src/optiondefs.h
@@ -2021,6 +2021,9 @@
     {"pumheight",   "ph",   P_NUM|P_VI_DEF,
 			    (char_u *)&p_ph, PV_NONE, NULL, NULL,
 			    {(char_u *)0L, (char_u *)0L} SCTX_INIT},
+    {"pummaxwidth", "pmw",   P_NUM|P_VI_DEF,
+			    (char_u *)&p_pmw, PV_NONE, NULL, NULL,
+			    {(char_u *)0L, (char_u *)0L} SCTX_INIT},
     {"pumwidth",    "pw",   P_NUM|P_VI_DEF,
 			    (char_u *)&p_pw, PV_NONE, NULL, NULL,
 			    {(char_u *)15L, (char_u *)15L} SCTX_INIT},