diff --git a/Mathlib/RingTheory/Regular/RegularSequence.lean b/Mathlib/RingTheory/Regular/RegularSequence.lean
index 5477dd102ec5b..8f2d5b1dc7f21 100644
--- a/Mathlib/RingTheory/Regular/RegularSequence.lean
+++ b/Mathlib/RingTheory/Regular/RegularSequence.lean
@@ -5,6 +5,7 @@ Authors: Brendan Murphy
 -/
 import Mathlib.RingTheory.Regular.IsSMulRegular
 import Mathlib.RingTheory.Artinian
+import Mathlib.RingTheory.Nakayama
 import Mathlib.Logic.Equiv.TransferInstance
 import Mathlib.RingTheory.LocalRing.MaximalIdeal.Basic