diff --git a/src/vitastor_c.cpp b/src/vitastor_c.cpp
index 0836190c..9f967b80 100644
--- a/src/vitastor_c.cpp
+++ b/src/vitastor_c.cpp
@@ -215,7 +215,7 @@ void vitastor_c_uring_wait_events(vitastor_c *client)
     client->ringloop->wait();
 }
 
-bool vitastor_c_uring_has_work(vitastor_c *client)
+int vitastor_c_uring_has_work(vitastor_c *client)
 {
     return client->ringloop->has_work();
 }
diff --git a/src/vitastor_c.h b/src/vitastor_c.h
index 0eccdca1..5cd8e8a4 100644
--- a/src/vitastor_c.h
+++ b/src/vitastor_c.h
@@ -46,7 +46,7 @@ int vitastor_c_uring_register_eventfd(vitastor_c *client);
 void vitastor_c_uring_wait_ready(vitastor_c *client);
 void vitastor_c_uring_handle_events(vitastor_c *client);
 void vitastor_c_uring_wait_events(vitastor_c *client);
-bool vitastor_c_uring_has_work(vitastor_c *client);
+int vitastor_c_uring_has_work(vitastor_c *client);
 void vitastor_c_read(vitastor_c *client, uint64_t inode, uint64_t offset, uint64_t len,
     struct iovec *iov, int iovcnt, VitastorReadHandler cb, void *opaque);
 void vitastor_c_write(vitastor_c *client, uint64_t inode, uint64_t offset, uint64_t len, uint64_t check_version,