diff --git a/base/include/refbase.h b/base/include/refbase.h
index 4113a63f47726b55d7d7e8beaa126aa34d7dcfd6..10a9625f1eae3f8ba8952466fb6162afd1d95107 100755
--- a/base/include/refbase.h
+++ b/base/include/refbase.h
@@ -336,6 +336,9 @@ template <typename T>
 inline sptr<T> &sptr<T>::operator=(const wptr<T> &other)
 {
     if ((other != nullptr) && other.AttemptIncStrongRef(this)) {
+		if (refs_ != nullptr) {
+        	refs_->DecStrongRef(this);
+    	}
         refs_ = other.GetRefPtr();
     } else {
         refs_ = nullptr;