diff --git a/src/main/java/org/cgiar/cgspace/ctasks/CountriesVocabulary.java b/src/main/java/org/cgiar/cgspace/ctasks/CountriesVocabulary.java
index 69b3987..1db73d6 100644
--- a/src/main/java/org/cgiar/cgspace/ctasks/CountriesVocabulary.java
+++ b/src/main/java/org/cgiar/cgspace/ctasks/CountriesVocabulary.java
@@ -23,6 +23,7 @@ import java.util.List;
 import com.google.gson.annotations.SerializedName;
 
 public class CountriesVocabulary {
+    // support reading iso_3166-3.json from Debian's iso-codes package using SerializedName since our class needs to match the JSON exactly
     @SerializedName("3166-1") List<Country> countries;
 
     class Country {