diff --git a/source/intro.tex b/source/intro.tex
index 75705a2bab..4977e47250 100644
--- a/source/intro.tex
+++ b/source/intro.tex
@@ -1029,7 +1029,7 @@
 \indextext{standard!structure of}%
 \ref{lex} through \ref{\lastcorechapter} describe the \Cpp{} programming
 language. That description includes detailed syntactic specifications in
-a form described in~\ref{syntax}. For convenience, \ref{gram}
+a form described in~\ref{intro.syntax}. For convenience, \ref{gram}
 repeats all such syntactic specifications.
 
 \pnum
@@ -1050,7 +1050,7 @@
 purposes; \ref{depr} describes those features.
 \indextext{standard!structure of|)}
 
-\rSec1[syntax]{Syntax notation}
+\rSec1[intro.syntax]{Syntax notation}
 
 \pnum
 \indextext{notation!syntax|(}%
diff --git a/source/preface.tex b/source/preface.tex
index 6e0b3fa036..0c4078489f 100644
--- a/source/preface.tex
+++ b/source/preface.tex
@@ -16,4 +16,4 @@ \chapter{Introduction}
 
 Aspects of the language syntax of \Cpp{} are distinguished typographically
 by the use of \fakegrammarterm{italic, sans-serif} type
-or \tcode{constant width} type to avoid ambiguities; see \ref{syntax}.
+or \tcode{constant width} type to avoid ambiguities; see \ref{intro.syntax}.