diff --git a/fuse/bfs_mount.cc b/fuse/bfs_mount.cc
index dd438d74..7b9a2c08 100644
--- a/fuse/bfs_mount.cc
+++ b/fuse/bfs_mount.cc
@@ -531,7 +531,7 @@ void* bfs_init(struct fuse_conn_info *conn) {
         g_bfs_cluster = "localhost:8828";
     }
     if (!baidu::bfs::FS::OpenFileSystem(g_bfs_cluster.c_str(), &g_fs, baidu::bfs::FSOptions())) {
-        fprintf(stderr, BFS"Open file sytem: %s fail\n", g_bfs_cluster.c_str());
+        fprintf(stderr, BFS"Open file system: %s fail\n", g_bfs_cluster.c_str());
         abort();
     }
     int32_t ret = g_fs->Access(g_bfs_path.c_str(), R_OK | W_OK);
diff --git a/src/client/bfs_client.cc b/src/client/bfs_client.cc
index 3df73cd3..ff05963f 100644
--- a/src/client/bfs_client.cc
+++ b/src/client/bfs_client.cc
@@ -528,7 +528,7 @@ int main(int argc, char* argv[]) {
     baidu::bfs::FS* fs;
     std::string ns_address = FLAGS_nameserver_nodes;
     if (!baidu::bfs::FS::OpenFileSystem(ns_address.c_str(), &fs, baidu::bfs::FSOptions())) {
-        fprintf(stderr, "Open filesytem %s fail\n", ns_address.c_str());
+        fprintf(stderr, "Open filesystem %s fail\n", ns_address.c_str());
         return 1;
     }
 
diff --git a/src/nameserver/block_mapping.cc b/src/nameserver/block_mapping.cc
index 1cdb9e1b..83853df4 100644
--- a/src/nameserver/block_mapping.cc
+++ b/src/nameserver/block_mapping.cc
@@ -734,7 +734,7 @@ void BlockMapping::ProcessRecoveredBlock(int32_t cs_id, int64_t block_id, Status
         return;
     }
     if (status == kCsNotFound) {
-        LOG(WARNING, "C%d doesnt't have block #%ld, remove from block mapping", cs_id, block_id);
+        LOG(WARNING, "C%d doesn't have block #%ld, remove from block mapping", cs_id, block_id);
         block->replica.erase(cs_id);
     }
     if (ret) {
diff --git a/src/test/mark.cc b/src/test/mark.cc
index 96d85665..584fc90a 100644
--- a/src/test/mark.cc
+++ b/src/test/mark.cc
@@ -52,7 +52,7 @@ class Random {
 Mark::Mark() : fs_(NULL), file_size_(FLAGS_file_size << 10),
                exit_(false), has_error_(false) {
     if (!FS::OpenFileSystem(FLAGS_nameserver_nodes.c_str(), &fs_, FSOptions())) {
-        std::cerr << "Open filesytem failed " << FLAGS_nameserver_nodes << std::endl;
+        std::cerr << "Open filesystem failed " << FLAGS_nameserver_nodes << std::endl;
         exit(EXIT_FAILURE);
     }