diff --git a/src/nix-store/nix-store.cc b/src/nix-store/nix-store.cc
index 9163eefd0..b453ea1ca 100644
--- a/src/nix-store/nix-store.cc
+++ b/src/nix-store/nix-store.cc
@@ -1093,7 +1093,7 @@ static int main_nix_store(int argc, char * * argv)
         if (op != opDump && op != opRestore) /* !!! hack */
             store = openStore();
 
-        op(opFlags, opArgs);
+        op(std::move(opFlags), std::move(opArgs));
 
         return 0;
     }