diff --git a/tests/update/test-save-delete-prefix.cpp b/tests/update/test-save-delete-prefix.cpp
index 5adec17..4f1d3a5 100644
--- a/tests/update/test-save-delete-prefix.cpp
+++ b/tests/update/test-save-delete-prefix.cpp
@@ -123,7 +123,7 @@
     // counter helps to check if multiple prefix of same name exists on conf file
     counter = 0;
     for (const auto& section : m_savePrefix.get_child("advertising")) {
-      auto b = section.second.get_value<std::string>();
+      auto b = section.first.data();
       if (b == prefixName) {
         counter++;
       }