diff --git a/doc/snort_manual.tex b/doc/snort_manual.tex
index 23111c0..322cbc6 100644
--- a/doc/snort_manual.tex
+++ b/doc/snort_manual.tex
@@ -15238,13 +15238,19 @@ P, H, D, M, C, K, S and Y.
 
 \subsubsection{Example}
 
-This example performs a case-insensitive search for the string BLAH in the payload.
+This example performs a case-insensitive search for the HTTP URI \texttt{foo.php?id=<some numbers>}
 
 \begin{verbatim}
-    alert ip any any -> any any (pcre:"/BLAH/i";)
+    alert tcp any any -> any 80 (content:"/foo.php?id="; pcre:"/\/foo.php?id=[0-9]{1,10}/iU";)
 \end{verbatim}
 
 \begin{note}
+It is wise to have at least one \texttt{content} keyword in a rule that uses \texttt{pcre}.  This
+allows the fast-pattern matcher to filter out non-matching packets so that the pcre evaluation is
+not performed on each and every packet coming across the wire.
+\end{note}
+
+\begin{note}
 
 Snort's handling of multiple URIs with PCRE does not work as expected.  PCRE
 when used without a \texttt{uricontent} only evaluates the first URI.  In order