diff --git a/test/unit/hpa_vectorized_madvise_large_batch.c b/test/unit/hpa_vectorized_madvise_large_batch.c
index e1393225..c974500c 100644
--- a/test/unit/hpa_vectorized_madvise_large_batch.c
+++ b/test/unit/hpa_vectorized_madvise_large_batch.c
@@ -113,6 +113,12 @@ defer_test_hugify(void *ptr, size_t size, bool sync) {
 	return false;
 }
 
+static size_t ndefer_dehugify_calls = 0;
+static void
+defer_test_dehugify(void *ptr, size_t size) {
+	++ndefer_dehugify_calls;
+}
+
 static nstime_t defer_curtime;
 static void
 defer_test_curtime(nstime_t *r_time, bool first_reading) {