diff -r c7a69b6cd405 -r b4ea943ce0b7 src/Pure/config.ML
--- a/src/Pure/config.ML	Wed Jan 02 21:18:35 2019 +0100
+++ b/src/Pure/config.ML	Thu Jan 03 12:34:26 2019 +0100
@@ -46,7 +46,7 @@
 
 fun print_value (Bool true) = "true"
   | print_value (Bool false) = "false"
-  | print_value (Int i) = signed_string_of_int i
+  | print_value (Int i) = Value.print_int i
   | print_value (Real x) = Value.print_real x
   | print_value (String s) = quote s;