diff --git a/nix/pkgs/starlink/convert.rb b/nix/pkgs/starlink/convert.rb
index 79ce2ee..ededc07 100644
--- a/nix/pkgs/starlink/convert.rb
+++ b/nix/pkgs/starlink/convert.rb
@@ -7,7 +7,7 @@ require 'json'
 HOSTNAME = IO::readlines("/proc/sys/kernel/hostname").join.strip
 
 def out path, x
-  puts "PUTVAL \"#{HOSTNAME}/exec-starlink/current-#{path.join '.'}\" #{x}"
+  puts "PUTVAL \"#{HOSTNAME}/exec-starlink/current-#{path.join '.'}\" N:#{x}"
 end
 
 def recurse path, x
@@ -22,7 +22,7 @@ def recurse path, x
 
   elsif x.kind_of? Float
     out path, x
-  elsif x.kind_of? Fixnum
+  elsif x.kind_of? Integer
     out path, x.to_f
   elsif x.kind_of? String and x =~ /^\-?\d*\.?\d+$/
     out path, x.to_f