diff --git a/src/Plugin/GeoclusterAlgorithm/GeohashGeoclusterAlgorithm.php b/src/Plugin/GeoclusterAlgorithm/GeohashGeoclusterAlgorithm.php
index 79566af..ae3513c 100644
--- a/src/Plugin/GeoclusterAlgorithm/GeohashGeoclusterAlgorithm.php
+++ b/src/Plugin/GeoclusterAlgorithm/GeohashGeoclusterAlgorithm.php
@@ -75,7 +75,7 @@ abstract class GeohashGeoclusterAlgorithm extends GeoclusterAlgorithmBase {
    */
   protected function finalizeClusters() {
     foreach ($this->values as &$value) {
-      if ($value->geocluster_count > 1) {
+      if (isset($value->geocluster_count) && $value->geocluster_count > 1) {
         $value->clustered = TRUE;
       }
     }