diff --git a/.changeset/famous-pillows-kiss.md b/.changeset/famous-pillows-kiss.md
new file mode 100644
index 000000000000..97f384436aad
--- /dev/null
+++ b/.changeset/famous-pillows-kiss.md
@@ -0,0 +1,5 @@
+---
+"@typescript/vfs": patch
+---
+
+Modify localStorage check to prevent crashes in Node 25
diff --git a/packages/typescript-vfs/src/index.ts b/packages/typescript-vfs/src/index.ts
index be88ea840ac8..11f0c0e2e43c 100755
--- a/packages/typescript-vfs/src/index.ts
+++ b/packages/typescript-vfs/src/index.ts
@@ -23,7 +23,7 @@ try {
 } catch (error) { }
 
 const hasProcess = typeof process !== `undefined`
-const shouldDebug = (hasLocalStorage && localStorage!.getItem("DEBUG")) || (hasProcess && process.env.DEBUG)
+const shouldDebug = (hasLocalStorage && typeof localStorage!.getItem === 'function' && localStorage!.getItem("DEBUG")) || (hasProcess && process.env.DEBUG)
 const debugLog = shouldDebug ? console.log : (_message?: any, ..._optionalParams: any[]) => ""
 
 export interface VirtualTypeScriptEnvironment {