diff -up enscript-1.6.5.2/src/psgen.c.bufpos-crash enscript-1.6.5.2/src/psgen.c

--- enscript-1.6.5.2/src/psgen.c.bufpos-crash	2013-05-13 16:18:05.119393660 +0100

+++ enscript-1.6.5.2/src/psgen.c	2013-05-13 16:19:17.634739778 +0100

@@ -1928,7 +1928,7 @@ get_next_token (InputStream *is, double

 			  bufpos--;

 			}

 		      /* Check the octal notations "\\%03o". */

-		      else if (bufpos - 2 > w

+		      else if (bufpos > 2 && bufpos - 2 > w

 			       && ISOCTAL (buffer[bufpos])

 			       && ISOCTAL (buffer[bufpos - 1])

 			       && ISOCTAL (buffer[bufpos - 2])