diff --git a/src/test/test-sizeof.c b/src/test/test-sizeof.c
index 3c9dc180fa4..e36bee4e8f9 100644
--- a/src/test/test-sizeof.c
+++ b/src/test/test-sizeof.c
@@ -89,5 +89,7 @@ int main(void) {
         printf("big_enum2_pos → %zu\n", sizeof(big_enum2_pos));
         printf("big_enum2_neg → %zu\n", sizeof(big_enum2_neg));
 
+        printf("timeval: %zu\n", sizeof(struct timeval));
+        printf("timespec: %zu\n", sizeof(struct timespec));
         return 0;
 }
diff --git a/src/timesync/timesyncd-manager.c b/src/timesync/timesyncd-manager.c
index 1c284f31e3e..3a89d9b1fac 100644
--- a/src/timesync/timesyncd-manager.c
+++ b/src/timesync/timesyncd-manager.c
@@ -416,7 +416,7 @@ static int manager_receive_response(sd_event_source *source, int fd, uint32_t re
                 .iov_base = &ntpmsg,
                 .iov_len = sizeof(ntpmsg),
         };
-        CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct timeval))) control;
+        CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct timespec))) control;
         union sockaddr_union server_addr;
         struct msghdr msghdr = {
                 .msg_iov = &iov,