diff --git a/components/libdl/dlfcn.h b/components/libdl/dlfcn.h
index 0569dedd1b..3c8b0a41b4 100644
--- a/components/libdl/dlfcn.h
+++ b/components/libdl/dlfcn.h
@@ -14,3 +14,5 @@ void *dlopen (const char *filename, int flag);
 const char *dlerror(void);
 void *dlsym(void *handle, const char *symbol);
 int dlclose (void *handle);
+
+#endif