diff --git a/jam/jam.h b/jam/jam.h
index 7d9c37ccc5..bb0953fc7e 100644
--- a/jam/jam.h
+++ b/jam/jam.h
@@ -464,7 +464,7 @@
  */
 
 # ifndef MAXLINE
-# define MAXLINE 51200	/* longest 'together' actions' */
+# define MAXLINE 140000	/* longest 'together' actions' */
 # endif
 
 # ifndef EXITOK