diff --git a/doc/manual/writing-nix-expressions.xml b/doc/manual/writing-nix-expressions.xml
index e155d0e367..09ee9cf1ef 100644
--- a/doc/manual/writing-nix-expressions.xml
+++ b/doc/manual/writing-nix-expressions.xml
@@ -714,7 +714,7 @@ configureFlags = "
     text on the initial line.</para>
 
     <para>Antiquotation
-    (<literal>${<replaceable>expr</replaceable>}}</literal>) is
+    (<literal>${<replaceable>expr</replaceable>}</literal>) is
     supported in indented strings.</para>
 
     <para>Since <literal>${</literal> and <literal>''</literal> have