diff --git a/ghc/docs/users_guide/using.sgml b/ghc/docs/users_guide/using.sgml
index 0024c218e6a350681d001bf32351727e034bbc4c..93a5a52d3b515e80263dc022f778bf393ca2bd87 100644
--- a/ghc/docs/users_guide/using.sgml
+++ b/ghc/docs/users_guide/using.sgml
@@ -417,7 +417,7 @@ standard <Filename>.hi</Filename>/<Filename>.o</Filename> suffixes; add <Option>
 	    <primary><literal>-keep-tmp-files</literal></primary>
 	  </indexterm>
 	  <indexterm>
-	    <primary>temporary files<primary>
+	    <primary>temporary files</primary>
 	    <secondary>keeping</secondary>
 	  </indexterm>
 	  <listitem>