diff --git a/regressions/ck_spinlock/benchmark/latency.h b/regressions/ck_spinlock/benchmark/latency.h
index 8abc9fe..7c49919 100644
--- a/regressions/ck_spinlock/benchmark/latency.h
+++ b/regressions/ck_spinlock/benchmark/latency.h
@@ -53,7 +53,7 @@ main(void)
 	#endif
 
 	uint64_t s_b, e_b, i;
-	int core = 0;
+	CK_CC_UNUSED int core = 0;
 
 	s_b = rdtsc();
 	for (i = 0; i < STEPS; ++i) {
diff --git a/regressions/ck_spinlock/benchmark/throughput.h b/regressions/ck_spinlock/benchmark/throughput.h
index c7271b2..7851c50 100644
--- a/regressions/ck_spinlock/benchmark/throughput.h
+++ b/regressions/ck_spinlock/benchmark/throughput.h
@@ -70,7 +70,7 @@ LOCK_DEFINE;
 CK_CC_USED static void
 gen_lock(void)
 {
-	int core = 0;
+	CK_CC_UNUSED int core = 0;
 #ifdef LOCK_STATE
 	LOCK_STATE;
 #endif