diff --git a/include/rtthread.h b/include/rtthread.h
index c92f7f012f4e17ab2df793e3078b1db9108b2bff..7671c63cd6778a45a894f0c2f8acdf26c2132066 100644
--- a/include/rtthread.h
+++ b/include/rtthread.h
@@ -563,6 +563,10 @@ void rt_assert_set_hook(void (*hook)(const char *ex, const char *func, rt_size_t
 void rt_assert_handler(const char *ex, const char *func, rt_size_t line);
 #endif /* RT_DEBUG */
 
+#ifdef RT_USING_FINSH
+#include <finsh.h>
+#endif
+
 /**@}*/
 
 #ifdef __cplusplus
diff --git a/tools/building.py b/tools/building.py
index 2a2f086b67405961ada67d7cf36ac5cf39cfa588..42cb37dc4f67bc6e526cb9b59acabdcbd3c98b5b 100644
--- a/tools/building.py
+++ b/tools/building.py
@@ -141,7 +141,7 @@ def PrepareBuilding(env, root_directory, has_libcpu=False, remove_components = [
         env['LIBDIRPREFIX'] = '--userlibpath '
 
     if rtconfig.PLATFORM == 'gcc':
-        if env['LINKFLAGS'].find('nano.specs'):
+        if str(env['LINKFLAGS']).find('nano.specs'):
             env.AppendUnique(CPPDEFINES = ['_REENT_SMALL'])
 
     # patch for win32 spawn