diff --git a/src/renderer.ts b/src/renderer.ts
index c9424ea..ffbe77e 100644
--- a/src/renderer.ts
+++ b/src/renderer.ts
@@ -197,7 +197,7 @@ function code(renderer: marked.Renderer, opts: MarkdownOptions) {
 
 const arg_pattern = /^(?:[a-zA-Z0-9_:-]+|"(?:[^"\n]|(?<=\\)")*")/;
 
-function parse_code_args(text: string) {
+function parse_code_args(text = '') {
 	const args: string[] = [ ];
 
 	text = text.trim();