diff --git a/step-paged-media/src/main/xml/specification.xml b/step-paged-media/src/main/xml/specification.xml
index 2aee311b..713e784b 100644
--- a/step-paged-media/src/main/xml/specification.xml
+++ b/step-paged-media/src/main/xml/specification.xml
@@ -144,6 +144,11 @@ are defined by the CSS implementation used and are
 <glossterm>implementation-defined</glossterm>.</impl>
 </para>
 
+<para>
+<error code="C0166">It is a <glossterm>dynamic error</glossterm> if the requested document
+cannot be produced.</error>   
+</para>
+
 <simplesect>
 <title>Document properties</title>
 <para feature="css-formatter-preserves-none">No document properties are preserved.</para>
@@ -190,6 +195,11 @@ are defined by the XSL implementation used and are
 <para>The output of this step is a document containing the result of
 processing. This is often, but not necessarily, a PDF document.</para>
 
+<para>
+<error code="C0167">It is a <glossterm>dynamic error</glossterm> if the requested document
+cannot be produced.</error>   
+</para>
+
 <simplesect>
 <title>Document properties</title>
 <para feature="xsl-formatter-preserves-none">No document properties are preserved.</para>