diff --git a/paddle/phi/common/scalar.h b/paddle/phi/common/scalar.h
index 1da77a0fa196413436030fc2864514cc222af6f8..9a5a3fbf921d07951873a1ee1c1d4d73b1a003db 100644
--- a/paddle/phi/common/scalar.h
+++ b/paddle/phi/common/scalar.h
@@ -191,6 +191,8 @@ class ScalarBase {
     }
   }
 
+  DataType dtype() const { return dtype_; }
+
  private:
   template <typename T1, typename T2>
   friend void CopyScalar(const ScalarBase<T1>& src, ScalarBase<T2>* dst);