diff --git a/Userland/Libraries/LibCore/System.h b/Userland/Libraries/LibCore/System.h
index c90e2f0c9f..24b68b37c1 100644
--- a/Userland/Libraries/LibCore/System.h
+++ b/Userland/Libraries/LibCore/System.h
@@ -13,7 +13,7 @@
 namespace Core::System {
 
 #ifdef __serenity__
-ErrorOr<void> pledge(StringView promises, StringView execpromises);
+ErrorOr<void> pledge(StringView promises, StringView execpromises = {});
 ErrorOr<void> unveil(StringView path, StringView permissions);
 ErrorOr<Array<int, 2>> pipe2(int flags);
 #endif