diff --git a/var/spack/repos/builtin/packages/go-bootstrap/package.py b/var/spack/repos/builtin/packages/go-bootstrap/package.py
index 1c73563f825..43409610e8f 100644
--- a/var/spack/repos/builtin/packages/go-bootstrap/package.py
+++ b/var/spack/repos/builtin/packages/go-bootstrap/package.py
@@ -65,7 +65,7 @@ def patch(self):
             r'# \1\2\3',
         )
 
-    @when('@1.5.0:')
+    @when('@1.5.0:')  # noqa: F811
     def patch(self):
         pass