diff --git a/extra/modules/greenbids-real-time-data/src/main/java/org/prebid/server/hooks/modules/greenbids/real/time/data/core/GreenbidsInferenceDataService.java b/extra/modules/greenbids-real-time-data/src/main/java/org/prebid/server/hooks/modules/greenbids/real/time/data/core/GreenbidsInferenceDataService.java
index 973c6f33eac..3f8a58671c3 100644
--- a/extra/modules/greenbids-real-time-data/src/main/java/org/prebid/server/hooks/modules/greenbids/real/time/data/core/GreenbidsInferenceDataService.java
+++ b/extra/modules/greenbids-real-time-data/src/main/java/org/prebid/server/hooks/modules/greenbids/real/time/data/core/GreenbidsInferenceDataService.java
@@ -113,11 +113,9 @@ private List<ThrottlingMessage> extractMessagesForImp(
     }
 
     private static String getCountryNameFromAlpha2(String isoCode) {
-        return Optional.ofNullable(isoCode)
-                .filter(code -> !code.isBlank())
-                .map(code -> new Locale(StringUtils.EMPTY, code))
-                .map(Locale::getDisplayCountry)
-                .orElse(StringUtils.EMPTY);
+        return StringUtils.isBlank(isoCode)
+                ? StringUtils.EMPTY
+                : new Locale(StringUtils.EMPTY, isoCode).getDisplayCountry();
     }
 
     private String getCountry(String ip) {