diff --git a/ghc-tasty.spec b/ghc-tasty.spec
index 4b1b1c5..5097c1e 100644
--- a/ghc-tasty.spec
+++ b/ghc-tasty.spec
@@ -41,6 +41,9 @@ BuildRequires:  ghc-tagged-prof
 BuildRequires:  ghc-transformers-prof
 BuildRequires:  ghc-unix-prof
 %endif
+%ifnarch x86_64 aarch64
+BuildRequires:  ghc-unbounded-delays-prof
+%endif
 # End cabal-rpm deps
 
 %description