diff --git a/src/Console/ModelsCommand.php b/src/Console/ModelsCommand.php
index 7e3b9ba..ed9d2d6 100644
--- a/src/Console/ModelsCommand.php
+++ b/src/Console/ModelsCommand.php
@@ -563,7 +563,7 @@ class ModelsCommand extends Command
                                         true,
                                         null,
                                         '',
-                                        $this->isRelationForeignKeyNullable($relationObj)
+                                        $this->isRelationNullable($relation, $relationObj)
                                     );
                                 }
                             }
@@ -575,22 +575,32 @@ class ModelsCommand extends Command
     }
 
     /**
-     * Check if the foreign key of the relation is nullable
+     * Check if the relation is nullable
      *
-     * @param Relation $relation
+     * @param string   $relation
+     * @param Relation $relationObj
      *
      * @return bool
      */
-    private function isRelationForeignKeyNullable(Relation $relation)
+    private function isRelationNullable(string $relation, Relation $relationObj): bool
     {
-        $reflectionObj = new \ReflectionObject($relation);
+        $reflectionObj = new \ReflectionObject($relationObj);
+
+        if (in_array($relation, ['hasOne', 'hasOneThrough', 'morphOne'], true)) {
+            $defaultProp = $reflectionObj->getProperty('withDefault');
+            $defaultProp->setAccessible(true);
+
+            return !$defaultProp->getValue($relationObj);
+        }
+
         if (!$reflectionObj->hasProperty('foreignKey')) {
             return false;
         }
+
         $fkProp = $reflectionObj->getProperty('foreignKey');
         $fkProp->setAccessible(true);
 
-        return isset($this->nullableColumns[$fkProp->getValue($relation)]);
+        return isset($this->nullableColumns[$fkProp->getValue($relationObj)]);
     }
 
     /**
diff --git a/tests/Console/ModelsCommand/Relations/Models/Simple.php b/tests/Console/ModelsCommand/Relations/Models/Simple.php
index 4359773..47861ca 100644
--- a/tests/Console/ModelsCommand/Relations/Models/Simple.php
+++ b/tests/Console/ModelsCommand/Relations/Models/Simple.php
@@ -26,6 +26,11 @@ class Simple extends Model
         return $this->hasOne(Simple::class);
     }
 
+    public function relationHasOneWithDefault(): HasOne
+    {
+        return $this->hasOne(Simple::class)->withDefault();
+    }
+
     public function relationBelongsTo(): BelongsTo
     {
         return $this->belongsTo(Simple::class);
diff --git a/tests/Console/ModelsCommand/Relations/Test.php b/tests/Console/ModelsCommand/Relations/Test.php
index f2b9a31..9fa97a7 100644
--- a/tests/Console/ModelsCommand/Relations/Test.php
+++ b/tests/Console/ModelsCommand/Relations/Test.php
@@ -81,10 +81,11 @@ use Illuminate\Database\Eloquent\Relations\MorphToMany;
  * @property-read \Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Relations\ModelsOtherNamespace\AnotherModel $relationBelongsToSameNameAsColumn
  * @property-read \Illuminate\Database\Eloquent\Collection|\Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Relations\Models\Simple[] $relationHasMany
  * @property-read int|null $relation_has_many_count
- * @property-read \Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Relations\Models\Simple $relationHasOne
+ * @property-read \Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Relations\Models\Simple|null $relationHasOne
+ * @property-read \Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Relations\Models\Simple $relationHasOneWithDefault
  * @property-read \Illuminate\Database\Eloquent\Collection|\Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Relations\Models\Simple[] $relationMorphMany
  * @property-read int|null $relation_morph_many_count
- * @property-read \Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Relations\Models\Simple $relationMorphOne
+ * @property-read \Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Relations\Models\Simple|null $relationMorphOne
  * @property-read \Illuminate\Database\Eloquent\Model|\Eloquent $relationMorphTo
  * @property-read \Illuminate\Database\Eloquent\Collection|\Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Relations\Models\Simple[] $relationMorphedByMany
  * @property-read int|null $relation_morphed_by_many_count
@@ -107,6 +108,11 @@ class Simple extends Model
         return $this->hasOne(Simple::class);
     }
 
+    public function relationHasOneWithDefault(): HasOne
+    {
+        return $this->hasOne(Simple::class)->withDefault();
+    }
+
     public function relationBelongsTo(): BelongsTo
     {
         return $this->belongsTo(Simple::class);