diff --git a/bin/sh/expand.c b/bin/sh/expand.c
index 25864bae13a2..6d0d78a398df 100644
--- a/bin/sh/expand.c
+++ b/bin/sh/expand.c
@@ -107,6 +107,7 @@ static void expmeta(char *, char *, struct arglist *);
 static int expsortcmp(const void *, const void *);
 static int patmatch(const char *, const char *);
 static void cvtnum(int, char *);
+static int collate_range_cmp(wchar_t, wchar_t);
 
 void
 emptyarglist(struct arglist *list)
@@ -137,6 +138,16 @@ appendarglist(struct arglist *list, char *str)
 	list->args[list->count++] = str;
 }
 
+static int
+collate_range_cmp(wchar_t c1, wchar_t c2)
+{
+	static wchar_t s1[2], s2[2];
+
+	s1[0] = c1;
+	s2[0] = c2;
+	return (wcscoll(s1, s2));
+}
+
 static char *
 stputs_quotes(const char *data, const char *syntax, char *p)
 {
@@ -1348,7 +1359,9 @@ patmatch(const char *pattern, const char *string)
 							return 0;
 					} else
 						wc2 = (unsigned char)*p++;
-					if (wc <= chr && chr <= wc2)
+					if (   collate_range_cmp(chr, wc) >= 0
+					    && collate_range_cmp(chr, wc2) <= 0
+					   )
 						found = 1;
 				} else {
 					if (chr == wc)
diff --git a/bin/sh/tests/builtins/case7.0 b/bin/sh/tests/builtins/case7.0
index 54db93d8ceb6..96b9de66fe27 100644
--- a/bin/sh/tests/builtins/case7.0
+++ b/bin/sh/tests/builtins/case7.0
@@ -14,6 +14,11 @@ c1=e
 c2=$(printf '\366')
 
 case $c1$c2 in
-[a-z][!a-z]) ;;
+[a-z][a-z]) ;;
+*) echo wrong at $LINENO ;;
+esac
+
+case $c1$c2 in
+[a-f][n-p]) ;;
 *) echo wrong at $LINENO ;;
 esac