diff --git a/packages/svelte/src/compiler/phases/1-parse/index.js b/packages/svelte/src/compiler/phases/1-parse/index.js
index 41c0dd2757..87e616d0a6 100644
--- a/packages/svelte/src/compiler/phases/1-parse/index.js
+++ b/packages/svelte/src/compiler/phases/1-parse/index.js
@@ -53,9 +53,9 @@ export class Parser {
 
 		for(const match of lang_matches)
 		{
-			if(!match[0]?.startsWith('<!--'))
+			if(match[0]?.[1] === 's') // ensure it starts with '<s' to match script tags
 			{
-				this.ts = match?.[2] === 'ts';
+				this.ts = match[2] === 'ts';
 				break;
 			}
 		}