diff --git a/scripts/kconfig/lxdialog/util.c b/scripts/kconfig/lxdialog/util.c
index d54440f..a1a1354 100644
--- a/scripts/kconfig/lxdialog/util.c
+++ b/scripts/kconfig/lxdialog/util.c
@@ -336,7 +336,7 @@
 		newl = 1;
 		word = tempstr;
 		while (word && *word) {
-			sp = index(word, ' ');
+			sp = strchr(word, ' ');
 			if (sp)
 				*sp++ = 0;
 
@@ -348,7 +348,7 @@
 			if (wlen > room ||
 			    (newl && wlen < 4 && sp
 			     && wlen + 1 + strlen(sp) > room
-			     && (!(sp2 = index(sp, ' '))
+			     && (!(sp2 = strchr(sp, ' '))
 				 || wlen + 1 + (sp2 - sp) > room))) {
 				cur_y++;
 				cur_x = x;