diff --git a/nixos/modules/installer/tools/nixos-option/nixos-option.cc b/nixos/modules/installer/tools/nixos-option/nixos-option.cc
index 1fde8986fdf..383755f884a 100644
--- a/nixos/modules/installer/tools/nixos-option/nixos-option.cc
+++ b/nixos/modules/installer/tools/nixos-option/nixos-option.cc
@@ -37,6 +37,7 @@ using nix::PathSet;
 using nix::Strings;
 using nix::Symbol;
 using nix::tAttrs;
+using nix::ThrownError;
 using nix::tLambda;
 using nix::tString;
 using nix::UsageError;