diff --git a/src/common_blocked_queue.h b/src/common_blocked_queue.h
index 83ff10f..51c6adf 100644
--- a/src/common_blocked_queue.h
+++ b/src/common_blocked_queue.h
@@ -100,7 +100,7 @@ static inline struct common_blocked_node *common_blocked_queue_alloc_node(
     struct common_blocked_node *node;
 
     pthread_mutex_lock(&(queue->lc_pair.lock));
-    node = fast_mblock_alloc_object(&queue->mblock);
+    node = (struct common_blocked_node *)fast_mblock_alloc_object(&queue->mblock);
     pthread_mutex_unlock(&(queue->lc_pair.lock));
     return node;
 }
diff --git a/src/fast_task_queue.h b/src/fast_task_queue.h
index 133d3e9..9902003 100644
--- a/src/fast_task_queue.h
+++ b/src/fast_task_queue.h
@@ -205,7 +205,7 @@ void free_queue_destroy(struct fast_task_queue *queue);
 static inline struct fast_task_info *free_queue_pop(
         struct fast_task_queue *queue)
 {
-    return fast_mblock_alloc_object(&queue->allocator);
+    return (struct fast_task_info *)fast_mblock_alloc_object(&queue->allocator);
 }
 
 void free_queue_push(struct fast_task_info *task);