diff --git a/src/ProgramBuilder.ts b/src/ProgramBuilder.ts
index 3d7bb2906..2e15b831c 100644
--- a/src/ProgramBuilder.ts
+++ b/src/ProgramBuilder.ts
@@ -254,7 +254,7 @@ export class ProgramBuilder {
     }
 
     private printDiagnostics(diagnostics?: BsDiagnostic[]) {
-        if (this.options.showDiagnosticsInConsole === false) {
+        if (this.options?.showDiagnosticsInConsole === false) {
             return;
         }
         if (!diagnostics) {