diff --git a/doc/concepts/regexp b/doc/concepts/regexp
index 9a9d70e..b04ca1b 100644
--- a/doc/concepts/regexp
+++ b/doc/concepts/regexp
@@ -1,16 +1,18 @@
 SYNOPSIS
         Regular Expressions
 
-
 DESCRIPTION
         LDMud supports both the traditional regular expressions as
-        implemented by Henry Spencer ("HS" or "traditional"), and the
-        Perl-compatible regular expressions by Philip Hazel ("PCRE").
+        implemented by Henry Spencer ("HS" or "traditional"), and 
+        optionally the Perl-compatible regular expressions by Philip 
+        Hazel ("PCRE").
         Both packages can be used concurrently, with the selection
         being made through extra option flags argument to the efuns.
         One of the two packages can be selected at compile time, by
         commandline argument, and by driver hook to be the default
         package.
+        If the host system does not supply PCREs at compile-time, they 
+        will not be availablea in the driver.
 
         The packages differ in the expressivity of their expressions
         (PCRE offering more options that Henry Spencer's package),
@@ -25,7 +27,6 @@
         For details, refer to the detailed manpages: hsregexp(C) for
         the Henry Spencer package, pcre(C) for the PCRE package.
 
-
 REGULAR EXPRESSION DETAILS
         A regular expression is a pattern that is matched against  a
         subject string from left to right. Most characters stand for
@@ -84,7 +85,6 @@
           \<      HS: Match begin of word.
           \>      HS: Match end of word.
 
-
 OPTIONS
         The package is selected with these option flags: