diff --git a/include/qemu/coroutine.h b/include/qemu/coroutine.h
index d848489b65..06d323143c 100644
--- a/include/qemu/coroutine.h
+++ b/include/qemu/coroutine.h
@@ -378,8 +378,9 @@ void qemu_coroutine_dec_pool_size(unsigned int additional_pool_size);
  * The same interface as qemu_sendv_recvv(), with added yielding.
  * XXX should mark these as coroutine_fn
  */
-ssize_t qemu_co_sendv_recvv(int sockfd, struct iovec *iov, unsigned iov_cnt,
-                            size_t offset, size_t bytes, bool do_send);
+ssize_t coroutine_fn qemu_co_sendv_recvv(int sockfd, struct iovec *iov,
+                                         unsigned iov_cnt, size_t offset,
+                                         size_t bytes, bool do_send);
 #define qemu_co_recvv(sockfd, iov, iov_cnt, offset, bytes) \
   qemu_co_sendv_recvv(sockfd, iov, iov_cnt, offset, bytes, false)
 #define qemu_co_sendv(sockfd, iov, iov_cnt, offset, bytes) \
@@ -388,7 +389,8 @@ ssize_t qemu_co_sendv_recvv(int sockfd, struct iovec *iov, unsigned iov_cnt,
 /**
  * The same as above, but with just a single buffer
  */
-ssize_t qemu_co_send_recv(int sockfd, void *buf, size_t bytes, bool do_send);
+ssize_t coroutine_fn qemu_co_send_recv(int sockfd, void *buf, size_t bytes,
+                                       bool do_send);
 #define qemu_co_recv(sockfd, buf, bytes) \
   qemu_co_send_recv(sockfd, buf, bytes, false)
 #define qemu_co_send(sockfd, buf, bytes) \