diff --git a/src/NCollection/NCollection_BaseVector.hxx b/src/NCollection/NCollection_BaseVector.hxx
index db68b8613d..7c8941818a 100755
--- a/src/NCollection/NCollection_BaseVector.hxx
+++ b/src/NCollection/NCollection_BaseVector.hxx
@@ -69,7 +69,8 @@ protected:
   {
   protected:
     Iterator()
-    : myICurBlock (0),
+    : myVector    (nullptr),
+      myICurBlock (0),
       myIEndBlock (0),
       myCurIndex  (0),
       myEndIndex  (0) {}
diff --git a/src/SelectMgr/SelectMgr_BVHThreadPool.hxx b/src/SelectMgr/SelectMgr_BVHThreadPool.hxx
index 84d8ab3765..3dd7afd0ad 100644
--- a/src/SelectMgr/SelectMgr_BVHThreadPool.hxx
+++ b/src/SelectMgr/SelectMgr_BVHThreadPool.hxx
@@ -42,6 +42,8 @@ public:
 
     BVHThread()
       : OSD_Thread(),
+      myPool(nullptr),
+      myMutex(),
       myToCatchFpe (Standard_False)
     {