diff --git a/examples/rime/example-rucb.c b/examples/rime/example-rucb.c
index 7bf5d3b1d..e3d291c52 100644
--- a/examples/rime/example-rucb.c
+++ b/examples/rime/example-rucb.c
@@ -89,7 +89,7 @@ read_chunk(struct rucb_conn *c, int offset, char *to, int maxsize)
   bytecount += size;
 
   if(bytecount == FILESIZE) {
-    printf("Completion time %lu / %u\n", (unsigned long)clock_time() - start_time, CLOCK_SECOND);
+    printf("Completion time %lu / %u\n", (unsigned long)clock_time() - start_time, (unsigned int)CLOCK_SECOND);
     print_stats();
   }
 
diff --git a/examples/rime/example-rudolph1.c b/examples/rime/example-rudolph1.c
index ebdf8a4cd..1dcf4b0af 100644
--- a/examples/rime/example-rudolph1.c
+++ b/examples/rime/example-rudolph1.c
@@ -83,9 +83,8 @@ write_chunk(struct rudolph1_conn *c, int offset, int flag,
   }
   
   if(datalen > 0) {
-    int ret;
     cfs_seek(fd, offset, CFS_SEEK_SET);
-    ret = cfs_write(fd, data, datalen);
+    cfs_write(fd, data, datalen);
   }
 
   cfs_close(fd);
diff --git a/examples/rime/example-rudolph2.c b/examples/rime/example-rudolph2.c
index 3b97d1857..fe9afd0dc 100644
--- a/examples/rime/example-rudolph2.c
+++ b/examples/rime/example-rudolph2.c
@@ -82,9 +82,8 @@ write_chunk(struct rudolph2_conn *c, int offset, int flag,
   }
   
   if(datalen > 0) {
-    int ret;
     cfs_seek(fd, offset, CFS_SEEK_SET);
-    ret = cfs_write(fd, data, datalen);
+    cfs_write(fd, data, datalen);
     printf("+++ rudolph2 offset %d, length %d\n", offset, datalen);
   }