1 files changed, 1 insertions, 1 deletions
diff --git a/src/r.bqn b/src/r.bqn
index 621b3548..65cf5bca 100644
--- a/src/r.bqn
+++ b/src/r.bqn
@@ -684,7 +684,7 @@ ProgressiveIndexOf ← 0 Fill {
   c←1-˜=𝕨
   "⊒: Rank of 𝕨 must be at least 1" ! 0≤c
   "⊒: Rank of 𝕩 must be at least cell rank of 𝕨" ! c≤=𝕩
-  𝕨⊐○(((≢∾2˙)⥊≍˘⟜OccurrenceCount∘⥊) 𝕨⊸⊐)𝕩
+  𝕨⊐○(((≢∾2˙)⥊≍˘⟜OccurrenceCount⍟(0<≠)∘⥊) 𝕨⊸⊐)𝕩
 }
 
 ⊏ ↩ FirstCell      ⊘ (ToArray⊸(SelSub _onAxes_ 1)) _fillBy_ ⊢