diff --git a/src/c-client.xsl b/src/c-client.xsl
index c90e94f..be6aa30 100644
--- a/src/c-client.xsl
+++ b/src/c-client.xsl
@@ -449,11 +449,6 @@ authorization from the authors.
         </xsl:when>
       </xsl:choose>
     </xsl:variable>
-    <xsl:choose>
-      <xsl:when test="self::error|self::errorcopy">
-        <constant type="number" name="{xcb:xcb-prefix(concat('Bad', @name))}" value="{@number}" />
-      </xsl:when>
-    </xsl:choose>
     <constant type="number" name="{xcb:xcb-prefix(@name)}" value="{@number}" />
     <xsl:choose>
       <xsl:when test="self::event|self::error">