--- src/roff/groff/pipeline.h.org	2005-12-10 18:26:48.000000000 +0300
+++ src/roff/groff/pipeline.h	2005-12-10 16:03:33.000000000 +0300
@@ -25,7 +25,7 @@
 #endif
 
 /* run_pipeline can handle at most this many commands */
-#define MAX_COMMANDS 12
+#define MAX_COMMANDS 13
 
 /* Children exit with this status if execvp fails. */
 #define EXEC_FAILED_EXIT_STATUS 0xff