diff --git a/src/backend/processor/diagnostics.ts b/src/backend/processor/diagnostics.ts
index 9c512ac..939f059 100644
--- a/src/backend/processor/diagnostics.ts
+++ b/src/backend/processor/diagnostics.ts
@@ -70,7 +70,7 @@ export class DiagnosticsApi {
 
     public reloadDiagnostics() {
         // TODO: Allow loading all diagnostics at once
-        const filesToLoad = this._openedFiles;
+        const filesToLoad = [...this._openedFiles];
 
         if (this._selectedEntry) {
             filesToLoad.push(this._selectedEntry.file);