diff --git a/bootstrap.fs b/bootstrap.fs
index 9270f19..189f516 100644
--- a/bootstrap.fs
+++ b/bootstrap.fs
@@ -1944,6 +1944,7 @@ variable source-buffer-end source-buffer source-buffer-end !
             \ lookup error code
             dup QUIT = if throw then
 
+            decimal
             '[' emit inputstreams @ input>file @ file>name type ':' emit
             inputstreams @ input>lineno @ 0 u.r ." ] "