diff --git a/src/option.c b/src/option.c
index 8097a7f..ebc547e 100644
--- a/src/option.c
+++ b/src/option.c
@@ -257,6 +257,9 @@
 # define PV_COCU	OPT_WIN(WV_COCU)
 # define PV_COLE	OPT_WIN(WV_COLE)
 #endif
+#ifdef FEAT_TERMINAL
+# define PV_TMS		OPT_WIN(WV_TMS)
+#endif
 #ifdef FEAT_SIGNS
 # define PV_SCL		OPT_WIN(WV_SCL)
 #endif
@@ -2778,6 +2781,15 @@
 			    {(char_u *)FALSE, (char_u *)FALSE}
 #endif
 			    SCRIPTID_INIT},
+    {"termsize", "tms",	    P_STRING|P_ALLOCED|P_RWIN|P_VI_DEF,
+#ifdef FEAT_TERMINAL
+			    (char_u *)VAR_WIN, PV_TMS,
+			    {(char_u *)"", (char_u *)NULL}
+#else
+			    (char_u *)NULL, PV_NONE,
+			    {(char_u *)NULL, (char_u *)0L}
+#endif
+			    SCRIPTID_INIT},
     {"terse",	    NULL,   P_BOOL|P_VI_DEF,
 			    (char_u *)&p_terse, PV_NONE,
 			    {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
@@ -10662,8 +10674,11 @@
 	case PV_CRBIND: return (char_u *)&(curwin->w_p_crb);
 #endif
 #ifdef FEAT_CONCEAL
-	case PV_COCU:    return (char_u *)&(curwin->w_p_cocu);
-	case PV_COLE:    return (char_u *)&(curwin->w_p_cole);
+	case PV_COCU:   return (char_u *)&(curwin->w_p_cocu);
+	case PV_COLE:   return (char_u *)&(curwin->w_p_cole);
+#endif
+#ifdef FEAT_TERMINAL
+	case PV_TMS:    return (char_u *)&(curwin->w_p_tms);
 #endif
 
 	case PV_AI:	return (char_u *)&(curbuf->b_p_ai);
@@ -10871,6 +10886,9 @@
     to->wo_cocu = vim_strsave(from->wo_cocu);
     to->wo_cole = from->wo_cole;
 #endif
+#ifdef FEAT_TERMINAL
+    to->wo_tms = vim_strsave(from->wo_tms);
+#endif
 #ifdef FEAT_FOLDING
     to->wo_fdc = from->wo_fdc;
     to->wo_fdc_save = from->wo_fdc_save;
@@ -10937,6 +10955,9 @@
 #ifdef FEAT_CONCEAL
     check_string_option(&wop->wo_cocu);
 #endif
+#ifdef FEAT_TERMINAL
+    check_string_option(&wop->wo_tms);
+#endif
 #ifdef FEAT_LINEBREAK
     check_string_option(&wop->wo_briopt);
 #endif
@@ -10976,6 +10997,9 @@
 #ifdef FEAT_CONCEAL
     clear_string_option(&wop->wo_cocu);
 #endif
+#ifdef FEAT_TERMINAL
+    clear_string_option(&wop->wo_tms);
+#endif
 }
 
 /*