diff --git a/src/kzg_proofs.c b/src/kzg_proofs.c
index eba730a..3a99e64 100644
--- a/src/kzg_proofs.c
+++ b/src/kzg_proofs.c
@@ -304,7 +304,7 @@ void proof_multi(void) {
     bool result;
 
     // Compute proof at 2^coset_scale points
-    int coset_scale = 3, coset_len = (1 << coset_scale);
+    int coset_scale = 4, coset_len = (1 << coset_scale);
     fr_t y[coset_len];
 
     uint64_t secrets_len = poly_len > coset_len ? poly_len : coset_len;