diff --git a/src/option.c b/src/option.c
index ca3e3d8..ec058e9 100644
--- a/src/option.c
+++ b/src/option.c
@@ -7949,7 +7949,7 @@
 {
     int		round, i, len, entries;
     char_u	*p, *s;
-    int		c1, c2 = 0;
+    int		c1 = 0, c2 = 0, c3 = 0;
     struct charstab
     {
 	int	*cp;
@@ -8001,8 +8001,12 @@
 	    for (i = 0; i < entries; ++i)
 		if (tab[i].cp != NULL)
 		    *(tab[i].cp) = (varp == &p_lcs ? NUL : ' ');
+
 	    if (varp == &p_lcs)
+	    {
 		lcs_tab1 = NUL;
+		lcs_tab3 = NUL;
+	    }
 	    else
 		fill_diff = '-';
 	}
@@ -8016,6 +8020,7 @@
 			&& p[len] == ':'
 			&& p[len + 1] != NUL)
 		{
+		    c1 = c2 = c3 = 0;
 		    s = p + len + 1;
 #ifdef FEAT_MBYTE
 		    c1 = mb_ptr2char_adv(&s);
@@ -8035,7 +8040,18 @@
 #else
 			c2 = *s++;
 #endif
+			if (!(*s == ',' || *s == NUL))
+			{
+#ifdef FEAT_MBYTE
+			    c3 = mb_ptr2char_adv(&s);
+			    if (mb_char2cells(c3) > 1)
+				continue;
+#else
+			    c3 = *s++;
+#endif
+			}
 		    }
+
 		    if (*s == ',' || *s == NUL)
 		    {
 			if (round)
@@ -8044,6 +8060,7 @@
 			    {
 				lcs_tab1 = c1;
 				lcs_tab2 = c2;
+				lcs_tab3 = c3;
 			    }
 			    else if (tab[i].cp != NULL)
 				*(tab[i].cp) = c1;