diff --git a/lib/spack/spack/stage.py b/lib/spack/spack/stage.py
index 01e069ded12..1b12966bc1e 100644
--- a/lib/spack/spack/stage.py
+++ b/lib/spack/spack/stage.py
@@ -542,7 +542,7 @@ def __exit__(self, exc_type, exc_val, exc_tb):
     def chdir_to_source(self):
         self.chdir()
 
-    def fetch(self, mirror_only):
+    def fetch(self, *args, **kwargs):
         tty.msg("No need to fetch for DIY.")
 
     def check(self):