diff --git a/src/nix-daemon/nix-daemon.cc b/src/nix-daemon/nix-daemon.cc
index 1b90fad16..d2bb7b8c8 100644
--- a/src/nix-daemon/nix-daemon.cc
+++ b/src/nix-daemon/nix-daemon.cc
@@ -621,6 +621,8 @@ static void performOp(ref<LocalStore> store, bool trusted, unsigned int clientVe
         from >> info.ca >> repair >> dontCheckSigs;
         if (!trusted && dontCheckSigs)
             dontCheckSigs = false;
+        if (!trusted)
+            info.ultimate = false;
 
         TeeSink tee(from);
         parseDump(tee, tee.source);