diff --git a/src/Http/Resources/BaseApiResource.php b/src/Http/Resources/BaseApiResource.php
index 037db40..60750dd 100644
--- a/src/Http/Resources/BaseApiResource.php
+++ b/src/Http/Resources/BaseApiResource.php
@@ -165,7 +165,7 @@ protected function relationships()
             }
 
             $data = $this->resource->$relationship;
-            if (0 == count($data)) {
+            if ($data instanceof Countable && 0 == count($data)) {
                 continue;
             }