diff --git a/builtin-commit.c b/builtin-commit.c
index a43f20199..45232a11c 100644
--- a/builtin-commit.c
+++ b/builtin-commit.c
@@ -317,6 +317,10 @@ static char *prepare_index(int argc, const char **argv, const char *prefix)
 	if (write_cache(fd, active_cache, active_nr) ||
 	    close_lock_file(&false_lock))
 		die("unable to write temporary index file");
+
+	discard_cache();
+	read_cache_from(false_lock.filename);
+
 	return false_lock.filename;
 }
 
diff --git a/t/t7502-status.sh b/t/t7502-status.sh
index b64ce30ff..e00607490 100755
--- a/t/t7502-status.sh
+++ b/t/t7502-status.sh
@@ -128,4 +128,25 @@ test_expect_success 'status without relative paths' '
 
 '
 
+cat <<EOF >expect
+# On branch master
+# Changes to be committed:
+#   (use "git reset HEAD <file>..." to unstage)
+#
+#	modified:   dir1/modified
+#
+# Untracked files:
+#   (use "git add <file>..." to include in what will be committed)
+#
+#	dir1/untracked
+#	dir2/
+#	expect
+#	output
+#	untracked
+EOF
+test_expect_success 'status of partial commit excluding new file in index' '
+	git status dir1/modified >output &&
+	diff -u expect output
+'
+
 test_done