diff --git a/build-helpers/loopy.spec b/build-helpers/loopy.spec
index 4649b1425ca83c2883735de2920937582b2ea263..08c0b6efe0efd3ad419b6565fd396c2f805eeab7 100644
--- a/build-helpers/loopy.spec
+++ b/build-helpers/loopy.spec
@@ -15,6 +15,7 @@ import packaging # pip install packaging to add
 a = Analysis(['../bin/loopy'],
              pathex=[expanduser('~/src/loopy')],
              hiddenimports=[
+                "decorator",
                 "appdirs",
                 "packaging.markers",
                 "packaging.specifiers",