diff --git a/src/Illuminate/Database/Eloquent/Relations/BelongsToMany.php b/src/Illuminate/Database/Eloquent/Relations/BelongsToMany.php
index edc630d6abaf..4c9fac593192 100755
--- a/src/Illuminate/Database/Eloquent/Relations/BelongsToMany.php
+++ b/src/Illuminate/Database/Eloquent/Relations/BelongsToMany.php
@@ -423,7 +423,7 @@ public function findOrFail($id, $columns = ['*'])
             return $result;
         }
 
-        throw (new ModelNotFoundException)->setModel(get_class($this->parent));
+        throw (new ModelNotFoundException)->setModel(get_class($this->related));
     }
 
     /**
@@ -453,7 +453,7 @@ public function firstOrFail($columns = ['*'])
             return $model;
         }
 
-        throw (new ModelNotFoundException)->setModel(get_class($this->parent));
+        throw (new ModelNotFoundException)->setModel(get_class($this->related));
     }
 
     /**
diff --git a/src/Illuminate/Database/Eloquent/Relations/HasManyThrough.php b/src/Illuminate/Database/Eloquent/Relations/HasManyThrough.php
index 19071b429e2a..3fb7a7cc255e 100644
--- a/src/Illuminate/Database/Eloquent/Relations/HasManyThrough.php
+++ b/src/Illuminate/Database/Eloquent/Relations/HasManyThrough.php
@@ -247,7 +247,7 @@ public function firstOrFail($columns = ['*'])
             return $model;
         }
 
-        throw (new ModelNotFoundException)->setModel(get_class($this->parent));
+        throw (new ModelNotFoundException)->setModel(get_class($this->related));
     }
 
     /**