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-rw-r--r--src/Cfe/Expression/Base.agda4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/Cfe/Expression/Base.agda b/src/Cfe/Expression/Base.agda
index 1cd57a7..aabab1b 100644
--- a/src/Cfe/Expression/Base.agda
+++ b/src/Cfe/Expression/Base.agda
@@ -100,5 +100,5 @@ rank (μ e) = suc (rank e)
infix 4 _<ᵣₐₙₖ_
-_<ᵣₐₙₖ_ : ∀ {n} → Rel (Expression n) _
-_<ᵣₐₙₖ_ = ℕ._<_ on rank
+_<ᵣₐₙₖ_ : ∀ {m n} → REL (Expression m) (Expression n) _
+e <ᵣₐₙₖ e′ = rank e ℕ.< rank e′