diff --git a/src/main/java/org/springframework/data/elasticsearch/utils/geohash/Geohash.java b/src/main/java/org/springframework/data/elasticsearch/utils/geohash/Geohash.java
index 410f06778..cc1f74e10 100644
--- a/src/main/java/org/springframework/data/elasticsearch/utils/geohash/Geohash.java
+++ b/src/main/java/org/springframework/data/elasticsearch/utils/geohash/Geohash.java
@@ -17,6 +17,7 @@
 
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Locale;
 
 import org.springframework.util.Assert;
 
@@ -84,7 +85,7 @@ public static String toLatLon(final String geohash) {
 		Assert.notNull(geohash, "geohash must not be null");
 
 		var point = Geohash.toPoint(geohash);
-		return String.format("%f,%f", point.getLat(), point.getLon());
+		return String.format(Locale.ROOT, "%f,%f", point.getLat(), point.getLon());
 	}
 
 	/**