diff --git a/lib/common/pool.c b/lib/common/pool.c
index 06d8a5f5..aeaca7e7 100644
--- a/lib/common/pool.c
+++ b/lib/common/pool.c
@@ -95,9 +95,9 @@ POOL_ctx *POOL_create(size_t numThreads, size_t queueSize) {
     ctx->queue = (POOL_job*) malloc(ctx->queueSize * sizeof(POOL_job));
     ctx->queueHead = 0;
     ctx->queueTail = 0;
-    pthread_mutex_init(&ctx->queueMutex, NULL);
-    pthread_cond_init(&ctx->queuePushCond, NULL);
-    pthread_cond_init(&ctx->queuePopCond, NULL);
+    (void)pthread_mutex_init(&ctx->queueMutex, NULL);
+    (void)pthread_cond_init(&ctx->queuePushCond, NULL);
+    (void)pthread_cond_init(&ctx->queuePopCond, NULL);
     ctx->shutdown = 0;
     /* Allocate space for the thread handles */
     ctx->threads = (pthread_t*)malloc(numThreads * sizeof(pthread_t));
diff --git a/lib/common/threading.h b/lib/common/threading.h
index 99e39b55..ee786455 100644
--- a/lib/common/threading.h
+++ b/lib/common/threading.h
@@ -42,14 +42,14 @@ extern "C" {
 
 /* mutex */
 #define pthread_mutex_t           CRITICAL_SECTION
-#define pthread_mutex_init(a,b)   (InitializeCriticalSection((a)), (void)0)
+#define pthread_mutex_init(a,b)   (InitializeCriticalSection((a)), 0)
 #define pthread_mutex_destroy(a)  DeleteCriticalSection((a))
 #define pthread_mutex_lock(a)     EnterCriticalSection((a))
 #define pthread_mutex_unlock(a)   LeaveCriticalSection((a))
 
 /* condition variable */
 #define pthread_cond_t             CONDITION_VARIABLE
-#define pthread_cond_init(a, b)    (InitializeConditionVariable((a)), (void)0)
+#define pthread_cond_init(a, b)    (InitializeConditionVariable((a)), 0)
 #define pthread_cond_destroy(a)    /* No delete */
 #define pthread_cond_wait(a, b)    SleepConditionVariableCS((a), (b), INFINITE)
 #define pthread_cond_signal(a)     WakeConditionVariable((a))