diff --git a/include/Tree.hh b/include/Tree.hh
index de2e7e7..d46ea4d 100644
--- a/include/Tree.hh
+++ b/include/Tree.hh
@@ -159,10 +159,10 @@ namespace pdg
     void addAccessForAllNodes(AccessTag accTag);
 
   private:
-    llvm::Value *_baseVal;
-    TreeNode *_rootNode;
-    int _size;
+    llvm::Value *_baseVal = nullptr;
+    TreeNode *_rootNode = nullptr;
+    int _size = 0;
   };
 } // namespace pdg
 
-#endif
\ No newline at end of file
+#endif