1 files changed, 1 insertions, 1 deletions
diff --git a/src/r1.bqn b/src/r1.bqn
index 896918d9..b173b892 100644
--- a/src/r1.bqn
+++ b/src/r1.bqn
@@ -912,7 +912,7 @@ PrimInverse ← INF _lookup_ ⟨
   '↑', ¯1⊸⊑_invChk_↑ ⊘ (IA∘0)
   '↓',  0⊸⊑_invChk_↓ ⊘ (IA∘0)
   '↕', ≢_invChk_↕ ⊘ (IA∘0)  # Should trace edge and invChk
-  '⌽', ⌽ ⊘ (-⊸⌽)
+  '⌽', ⌽ ⊘ (-⊸⌽ ⊣ IX∘IsArray∘⊢)
   '⍉', TransposeInv ⊘ ReorderAxesInv
   '/', IndicesInv ⊘ (IA∘0)
   '⊔', GroupIndsInv ⊘ GroupInv