diff --git a/src/Jenssegers/Mongodb/Helpers/QueriesRelationships.php b/src/Jenssegers/Mongodb/Helpers/QueriesRelationships.php
index 99798ea4f..14d72f622 100644
--- a/src/Jenssegers/Mongodb/Helpers/QueriesRelationships.php
+++ b/src/Jenssegers/Mongodb/Helpers/QueriesRelationships.php
@@ -153,16 +153,18 @@ protected function getConstrainedRelatedIds($relations, $operator, $count)
      */
     protected function getRelatedConstraintKey($relation)
     {
+        $prefix = $this->model instanceof Model ? '' : $this->model->getTable().'.';
+
         if ($relation instanceof HasOneOrMany) {
-            return $this->model->getKeyName();
+            return $prefix.$this->model->getKeyName();
         }
 
         if ($relation instanceof BelongsTo) {
-            return $relation->getForeignKeyName();
+            return $prefix.$relation->getForeignKeyName();
         }
 
         if ($relation instanceof BelongsToMany && !$this->isAcrossConnections($relation)) {
-            return $this->model->getKeyName();
+            return $prefix.$this->model->getKeyName();
         }
 
         throw new Exception(class_basename($relation) . ' is not supported for hybrid query constraints.');