1 files changed, 1 insertions, 0 deletions

diff --git a/users/sterni/exercises/aoc/lib.bqn b/users/sterni/exercises/aoc/lib.bqn
index 025102b776..636eeace78 100644
--- a/users/sterni/exercises/aoc/lib.bqn
+++ b/users/sterni/exercises/aoc/lib.bqn
@@ -4,5 +4,6 @@ ReadInt ⇐ {(𝕨⊸×+⊣)´∘⌽-⟜'0'𝕩} # stolen from leah2
 ReadDec ⇐ 10⊸ReadInt
 
 SplitOn ⇐ ((⊢ (-1˙)⍟⊣¨ +`∘(1⊸»<⊢))∘(≡¨)⊔⊢)
+SplitAt ← ((⊣≤↕∘≠∘⊢)⊔⊢)
 
 _fix ⇐ {𝕩 𝕊∘⊢⍟≢ 𝔽 𝕩}