diff --git a/dvc/output.py b/dvc/output.py
index 342bed3b6..39a0d08a5 100644
--- a/dvc/output.py
+++ b/dvc/output.py
@@ -287,7 +287,8 @@ class Output(Dependency):
             return
 
         if not self.cache or not os.path.exists(self.cache):
-            self.project.logger.warn(u'\'{}\': cache file not found'.format(self.rel_path))
+            if self.cache:
+                self.project.logger.warn(u'\'{}({})\': cache file not found'.format(self.rel_cache, self.rel_path))
             self.remove()
             return