diff --git a/app/api/debug-users/route.ts b/app/api/debug-users/route.ts
index 4aa694e..3ac7130 100644
--- a/app/api/debug-users/route.ts
+++ b/app/api/debug-users/route.ts
@@ -24,6 +24,9 @@ export async function GET() {
     });
   } catch (error) {
     console.error("Debug error:", error);
-    return NextResponse.json({ error: error.message }, { status: 500 });
+    return NextResponse.json(
+      { error: error instanceof Error ? error.message : "Unknown error" },
+      { status: 500 }
+    );
   }
 }