diff --git a/ppm b/ppm
index 9af239277..915cbf6e5 160000
--- a/ppm
+++ b/ppm
@@ -1 +1 @@
-Subproject commit 9af239277180f2a9ee9e86714f73fb2c33b1e66b
+Subproject commit 915cbf6e5f9ea1141ef5dcaf86343237e17bf380