diff --git a/modules/gdscript/gdscript_parser.cpp b/modules/gdscript/gdscript_parser.cpp
index 89e102a858a..81652c3d37f 100644
--- a/modules/gdscript/gdscript_parser.cpp
+++ b/modules/gdscript/gdscript_parser.cpp
@@ -4443,7 +4443,9 @@ void GDScriptParser::_parse_class(ClassNode *p_class) {
 				continue;
 			} break;
 			case GDScriptTokenizer::TK_PR_SLAVE:
+#ifdef DEBUG_ENABLED
 				_add_warning(GDScriptWarning::DEPRECATED_KEYWORD, tokenizer->get_token_line(), "slave", "puppet");
+#endif
 			case GDScriptTokenizer::TK_PR_PUPPET: {
 
 				//may be fallthrough from export, ignore if so