diff --git a/doc/syntax_perl.qbk b/doc/syntax_perl.qbk
index 17aeb00b..2b8b13fb 100644
--- a/doc/syntax_perl.qbk
+++ b/doc/syntax_perl.qbk
@@ -28,6 +28,8 @@ following special characters:
 
 [pre .\[{}()\\\*+?|^$]
 
+Other characters are special only in certain situations - for example `]` is special only after an opening `[`.
+
 [h4 Wildcard]
 
 The single character '.' when used outside of a character set will match