1 files changed, 1 insertions, 1 deletions

diff --git a/src/r.bqn b/src/r.bqn
index b4517051..a2d15187 100644
--- a/src/r.bqn
+++ b/src/r.bqn
@@ -146,7 +146,7 @@ Reverse←{
 }
 Rot←{
   "𝕨⌽𝕩: 𝕨 must consist of integers" ! Int𝕨
-  l←≠𝕩 ⋄ 𝕨-↩l×⌊𝕨÷l ⋄ ((𝕨+⊢-l×(l-𝕨)≤⊢)⌜↕l) ⊏ 𝕩
+  l←≠𝕩 ⋄ 𝕨-↩l×⌊𝕨÷l+l=0 ⋄ ((𝕨+⊢-l×(l-𝕨)≤⊢)⌜↕l) ⊏ 𝕩
 }
 
 Prefixes←{