diff --git a/tile/init.cc b/tile/init.cc
index 2cc3248..634f6ec 100644
--- a/tile/init.cc
+++ b/tile/init.cc
@@ -32,6 +32,7 @@ namespace tile {
 namespace {
 
 std::atomic<bool> g_quit_siganl{false};
+std::atomic<bool> g_tile_running{false};
 
 void
 QuitSignalHandler(int sig)
@@ -58,6 +59,11 @@ InstallQuitSignalHandler()
 int
 Start(int argc, char **argv, std::function<int(int, char **)> cb, bool single_thread, bool enable_crash_catch)
 {
+    {
+        bool expected = false;
+        TILE_CHECK(g_tile_running.compare_exchange_strong(expected, true), "tile already running.");
+    }
+
     if (enable_crash_catch) {
         // TODO: Add InstallFailureSignalHandler
         // google::InstallFailureSignalHandler();
@@ -139,6 +145,7 @@ void
 Init(int argc, char **argv, std::function<int(int, char **)> cb)
 {
     std::unique_lock<std::mutex> _(init_lock);
+    TILE_CHECK(g_tile_running.load() == false, "tile already running.");
     assert(lib_thread && "ReInitialize!!!");
     const char *my_argv[1] = {"unknown"};