diff --git a/ConflictSet.cpp b/ConflictSet.cpp
index 346469b..ec32d43 100644
--- a/ConflictSet.cpp
+++ b/ConflictSet.cpp
@@ -2957,7 +2957,7 @@ horizontalMax16(InternalVersionT *vs, [[maybe_unused]] InternalVersionT z) {
   }
   return max;
 #else
-  uint32_t zero;
+  uint32_t zero; // GCOVR_EXCL_LINE
   memcpy(&zero, &z, sizeof(zero));
   auto zeroVec = _mm512_set1_epi32(zero);
   return InternalVersionT(zero + _mm512_reduce_max_epi32(_mm512_sub_epi32(