diff --git a/coreutils/sort.c b/coreutils/sort.c
index 98cea7cd7..60fc95222 100644
--- a/coreutils/sort.c
+++ b/coreutils/sort.c
@@ -236,7 +236,7 @@ int sort_main(int argc, char **argv)
 	bb_default_error_retval = 2;
 	/* Parse command line options */
 	while((c=getopt(argc,argv,optlist))>0) {
-		line=index(optlist,c);
+		line=strchr(optlist,c);
 		if(!line) bb_show_usage();
 		switch(*line) {
 #ifdef CONFIG_FEATURE_SORT_BIG
@@ -267,7 +267,7 @@ int sort_main(int argc, char **argv)
 							break;
 						} /* no else needed: fall through to syntax error
 							 because comma isn't in optlist */
-						temp2=index(optlist,*temp);
+						temp2=strchr(optlist,*temp);
 						flag=(1<<(temp2-optlist));
 						if(!temp2 || (flag>FLAG_M && flag<FLAG_b))
 							bb_error_msg_and_die("Unknown key option.");
diff --git a/loginutils/deluser.c b/loginutils/deluser.c
index b647537d9..1b9bc4439 100644
--- a/loginutils/deluser.c
+++ b/loginutils/deluser.c
@@ -43,7 +43,7 @@ static inline Bounds boundary(const char *buffer, const char *login)
 	}
 	start++;
 
-	stop = index(start, '\n');	/* index is a BSD-ism */
+	stop = strchr(start, '\n');
 	b.start = start - buffer;
 	b.stop = stop - buffer;
 	return b;
diff --git a/scripts/config/lxdialog/util.c b/scripts/config/lxdialog/util.c
index 47afa5e6a..1e4b662c0 100644
--- a/scripts/config/lxdialog/util.c
+++ b/scripts/config/lxdialog/util.c
@@ -221,7 +221,7 @@ print_autowrap (WINDOW * win, const char *prompt, int width, int y, int x)
 	newl = 1;
 	word = tempstr;
 	while (word && *word) {
-	    sp = index(word, ' ');
+	    sp = strchr(word, ' ');
 	    if (sp)
 	        *sp++ = 0;
 
@@ -232,7 +232,7 @@ print_autowrap (WINDOW * win, const char *prompt, int width, int y, int x)
 	    wlen = strlen(word);
 	    if (wlen > room ||
 	       (newl && wlen < 4 && sp && wlen+1+strlen(sp) > room
-		     && (!(sp2 = index(sp, ' ')) || wlen+1+(sp2-sp) > room))) {
+		     && (!(sp2 = strchr(sp, ' ')) || wlen+1+(sp2-sp) > room))) {
 		cur_y++;
 		cur_x = x;
 	    }