diff --git a/handlers/handlers.go b/handlers/handlers.go
index 0596fdd08bdf5a4ae8b1fd2f8afc85263c1f7dbf..940fe1e6dc236d403f46b82bb410e44f81ec0f2b 100644
--- a/handlers/handlers.go
+++ b/handlers/handlers.go
@@ -69,7 +69,7 @@ func ReadershipHandler(w http.ResponseWriter, r *http.Request) {
     var readershipDetails []models.ReadershipDetail
     var totalReadership int64 = 0
     for _, country := range countries { // Directly range over countries
-        population, err := services.FetchPopulationByCountryCode(country.ISOCode)
+        population, err := services.FetchPopulationByCountryCode(country.ISO3166_1_Alpha_2)
         if err != nil {
             http.Error(w, err.Error(), http.StatusInternalServerError)
             return