diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2f0d03732..ef7baac25 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -65,7 +65,7 @@ endfunction ()
 
 check_ext ("OpenEXR" "openexr/OpenEXR" ca757f97033ae7cfcc6130f23c0e9ee86b108b07)
 check_ext ("OpenVDB" "openvdb/nanovdb" 414bed84c2fc22e188eac7b611aa85c7edd7a5a9)
-check_ext ("Ptex" "ptex/src" ba306d31270162649585123d48c827bd6309051f)
+check_ext ("Ptex" "ptex/src" be86139985b31e02068799928e05a77c4d95bf7c)
 check_ext ("double-conversion" "double-conversion/cmake" cc1f75a114aca8d2af69f73a5a959aecbab0e87a)
 check_ext ("filesystem" "filesystem/filesystem" c5f9de30142453eb3c6fe991e82dfc2583373116)
 check_ext ("glfw" "glfw/docs" 7b6aead9fb88b3623e3b3725ebb42670cbe4c579)
diff --git a/src/ext/ptex b/src/ext/ptex
index ba306d312..be8613998 160000
--- a/src/ext/ptex
+++ b/src/ext/ptex
@@ -1 +1 @@
-Subproject commit ba306d31270162649585123d48c827bd6309051f
+Subproject commit be86139985b31e02068799928e05a77c4d95bf7c