diff --git a/docs/docs/quick_start.md b/docs/docs/quick_start.md
index 2abe7d4..e49069a 100644
--- a/docs/docs/quick_start.md
+++ b/docs/docs/quick_start.md
@@ -41,9 +41,10 @@ int main() {
         vector.data(), dim, bits, code.data(), delta, vl, config
     );
 
-    // reconstruct  
-    float * reconstructed_data = new float [padded_dim];
-    rabitqlib::quant::reconstruct_vec(code, delta, vl, padded_dim, reconstructed_data);
+    // reconstruct
+    size_t padded_dim = dim;
+    std::vector<float> reconstructed_data(padded_dim);
+    rabitqlib::quant::reconstruct_vec(code.data(), delta, vl, padded_dim, reconstructed_data.data());
 
     return 0;
 }