diff --git a/ConflictSet.cpp b/ConflictSet.cpp
index 5ff2a75..346469b 100644
--- a/ConflictSet.cpp
+++ b/ConflictSet.cpp
@@ -2911,8 +2911,8 @@ void addPointWrite(Node *&root, std::span<const uint8_t> key,
 }
 
 #if defined(HAS_AVX) && !defined(__SANITIZE_THREAD__)
-__attribute__((target("avx512f"))) InternalVersionT
-horizontalMaxUpTo16(InternalVersionT *vs, InternalVersionT z, int len) {
+__attribute__((target("avx512f"))) InternalVersionT horizontalMaxUpTo16(
+    InternalVersionT *vs, [[maybe_unused]] InternalVersionT z, int len) {
   assume(len <= 16);
 #if USE_64_BIT
   // Hope it gets vectorized
@@ -2948,7 +2948,7 @@ horizontalMaxUpTo16(InternalVersionT *vs, InternalVersionT, int len) {
 
 #if defined(HAS_AVX) && !defined(__SANITIZE_THREAD__)
 __attribute__((target("avx512f"))) InternalVersionT
-horizontalMax16(InternalVersionT *vs, InternalVersionT z) {
+horizontalMax16(InternalVersionT *vs, [[maybe_unused]] InternalVersionT z) {
 #if USE_64_BIT
   // Hope it gets vectorized
   InternalVersionT max = vs[0];