diff --git a/pxr/base/trace/eventTree.cpp b/pxr/base/trace/eventTree.cpp
index 5b0d839a4e..46b0dc8fc7 100644
--- a/pxr/base/trace/eventTree.cpp
+++ b/pxr/base/trace/eventTree.cpp
@@ -30,8 +30,6 @@
 
 #include "pxr/base/js/json.h"
 
-#include <boost/optional.hpp>
-
 PXR_NAMESPACE_OPEN_SCOPE
 
 TraceEventTreeRefPtr
diff --git a/pxr/usd/usdSkel/cacheImpl.h b/pxr/usd/usdSkel/cacheImpl.h
index 1c5e2eb798..c0fae44935 100644
--- a/pxr/usd/usdSkel/cacheImpl.h
+++ b/pxr/usd/usdSkel/cacheImpl.h
@@ -38,8 +38,6 @@
 #include "pxr/usd/usdSkel/skeletonQuery.h"
 #include "pxr/usd/usdSkel/skinningQuery.h"
 
-#include <boost/optional.hpp>
-
 #include <tbb/concurrent_hash_map.h>
 #include <tbb/queuing_rw_mutex.h>