diff --git a/test/test_unordered_map.cpp b/test/test_unordered_map.cpp
index d7ff8459..f4e0d4d0 100644
--- a/test/test_unordered_map.cpp
+++ b/test/test_unordered_map.cpp
@@ -420,7 +420,7 @@ namespace
       bool isEqual = etl::equal(data.begin(),
                                 data.end(),
                                 other_data.begin(),
-                                std::equal_to<DataNDC::key_type>());
+                                std::equal_to<DataNDC::value_type>());
 
       CHECK(isEqual);
     }