diff --git a/src/optiondefs.h b/src/optiondefs.h
index 81bb1db..5df5fb7 100644
--- a/src/optiondefs.h
+++ b/src/optiondefs.h
@@ -1779,7 +1779,7 @@
 			    (char_u *)&p_mouset, PV_NONE, NULL, NULL,
 			    {(char_u *)500L, (char_u *)0L} SCTX_INIT},
     {"msghistory","mhi",    P_NUM|P_VI_DEF,
-			    (char_u *)&p_mhi, PV_NONE, NULL, NULL,
+			    (char_u *)&p_mhi, PV_NONE, did_set_msghistory, NULL,
 			    {(char_u *)500L, (char_u *)0L} SCTX_INIT},
     {"mzquantum",  "mzq",   P_NUM,
 #ifdef FEAT_MZSCHEME