diff --git a/nshlib/nsh.h b/nshlib/nsh.h
index 0231ef510..9ca6b009f 100644
--- a/nshlib/nsh.h
+++ b/nshlib/nsh.h
@@ -697,7 +697,8 @@
 #endif
 
 #if defined(CONFIG_DISABLE_ENVIRON) && defined(CONFIG_NSH_DISABLESCRIPT)
-#  define CONFIG_NSH_DISABLE_SET
+#  undef  CONFIG_NSH_DISABLE_SET
+#  define CONFIG_NSH_DISABLE_SET 1
 #endif
 
 /****************************************************************************