diff --git a/builtin/reset.c b/builtin/reset.c
index 4fd1c6c51d3ce5af60f2978f3839c0e595d3fece..f4e087596b6337d2306af4cf45119752b4a049ea 100644
--- a/builtin/reset.c
+++ b/builtin/reset.c
@@ -333,7 +333,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 	if (reset_type == NONE)
 		reset_type = MIXED; /* by default */
 
-	if (reset_type != SOFT && reset_type != MIXED)
+	if (reset_type != SOFT && (reset_type != MIXED || get_git_work_tree()))
 		setup_work_tree();
 
 	if (reset_type == MIXED && is_bare_repository())
@@ -356,8 +356,9 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 			int flags = quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN;
 			if (read_from_tree(&pathspec, sha1, intent_to_add))
 				return 1;
-			refresh_index(&the_index, flags, NULL, NULL,
-				      _("Unstaged changes after reset:"));
+			if (get_git_work_tree())
+				refresh_index(&the_index, flags, NULL, NULL,
+					      _("Unstaged changes after reset:"));
 		} else {
 			int err = reset_index(sha1, reset_type, quiet);
 			if (reset_type == KEEP && !err)
diff --git a/t/t7102-reset.sh b/t/t7102-reset.sh
index bc0846f4356e548cc72d3cf0c18ef00c21ede87d..450529404c686469ed5ba5ad465cf8b3ef651ef9 100755
--- a/t/t7102-reset.sh
+++ b/t/t7102-reset.sh
@@ -550,4 +550,15 @@ test_expect_success 'reset -N keeps removed files as intent-to-add' '
 	test_cmp expect actual
 '
 
+test_expect_success 'reset --mixed sets up work tree' '
+	git init mixed_worktree &&
+	(
+		cd mixed_worktree &&
+		test_commit dummy
+	) &&
+	: >expect &&
+	git --git-dir=mixed_worktree/.git --work-tree=mixed_worktree reset >actual &&
+	test_cmp expect actual
+'
+
 test_done