diff --git a/app/src/main/java/cz/melkamar/andruian/viewlink/Constants.java b/app/src/main/java/cz/melkamar/andruian/viewlink/Constants.java
index bad360c..c80f14a 100644
--- a/app/src/main/java/cz/melkamar/andruian/viewlink/Constants.java
+++ b/app/src/main/java/cz/melkamar/andruian/viewlink/Constants.java
@@ -7,4 +7,6 @@ public class Constants {
      * This value effectively corresponds to an index server's /api/query?clusterLimit parameter.
      */
     public static final int CLUSTERING_THRESHOLD = 1000;
+
+    public static final int FORCE_CLUSTER_RADIUS_THRESHOLD = 5;
 }
diff --git a/app/src/main/java/cz/melkamar/andruian/viewlink/data/place/IndexServerPlaceFetcher.java b/app/src/main/java/cz/melkamar/andruian/viewlink/data/place/IndexServerPlaceFetcher.java
index 1946829..5aad096 100644
--- a/app/src/main/java/cz/melkamar/andruian/viewlink/data/place/IndexServerPlaceFetcher.java
+++ b/app/src/main/java/cz/melkamar/andruian/viewlink/data/place/IndexServerPlaceFetcher.java
@@ -42,7 +42,8 @@ public PlaceFetcher.FetchPlacesResult fetchPlaces(DataDef dataDef, double latitu
                         new KeyVal("long", longitude + ""),
                         new KeyVal("r", kmRadius + ""),
                         new KeyVal("type", dataDef.getSourceClassDef().getClassUri() + ""),
-                        new KeyVal("clusterLimit", Constants.CLUSTERING_THRESHOLD + "")
+                        new KeyVal("clusterLimit", Constants.CLUSTERING_THRESHOLD + ""),
+                        new KeyVal("forceCluster", kmRadius > Constants.FORCE_CLUSTER_RADIUS_THRESHOLD ? "true" : "false")
                 });
 
         if (result.hasError()) {