diff --git a/src/Mpociot/Versionable/VersionableTrait.php b/src/Mpociot/Versionable/VersionableTrait.php
index cb02e60..d1d584c 100644
--- a/src/Mpociot/Versionable/VersionableTrait.php
+++ b/src/Mpociot/Versionable/VersionableTrait.php
@@ -268,7 +268,7 @@ private function isValidForVersioning()
             $removeableKeys[] = $updatedAt;
         }
 
-        if (method_exists($this, 'getDeletedAtColumn') && ($deletedAt = $this->getDeletedAtColumn() !== null)) {
+        if (method_exists($this, 'getDeletedAtColumn') && ($deletedAt = $this->getDeletedAtColumn()) !== null) {
             $removeableKeys[] = $deletedAt;
         }