diff --git a/Eloquent/Relations/Concerns/InteractsWithPivotTable.php b/Eloquent/Relations/Concerns/InteractsWithPivotTable.php
index c6812b75a..b0abf2848 100644
--- a/Eloquent/Relations/Concerns/InteractsWithPivotTable.php
+++ b/Eloquent/Relations/Concerns/InteractsWithPivotTable.php
@@ -429,7 +429,7 @@ public function detach($ids = null, $touch = true)
                     return 0;
                 }
 
-                $query->whereIn($this->relatedPivotKey, (array) $ids);
+                $query->whereIn($this->getQualifiedRelatedPivotKeyName(), (array) $ids);
             }
 
             // Once we have all of the conditions set on the statement, we are ready
@@ -544,7 +544,7 @@ public function newPivotQuery()
             $query->whereIn(...$arguments);
         }
 
-        return $query->where($this->foreignPivotKey, $this->parent->{$this->parentKey});
+        return $query->where($this->getQualifiedForeignPivotKeyName(), $this->parent->{$this->parentKey});
     }
 
     /**