diff --git a/expat/lib/xmlparse.c b/expat/lib/xmlparse.c
index 1ba48530..829e2b35 100644
--- a/expat/lib/xmlparse.c
+++ b/expat/lib/xmlparse.c
@@ -1401,6 +1401,7 @@ XML_UseForeignDTD(XML_Parser parser, XML_Bool useDTD) {
   parser->m_useForeignDTD = useDTD;
   return XML_ERROR_NONE;
 #else
+  UNUSED_P(useDTD);
   return XML_ERROR_FEATURE_REQUIRES_XML_DTD;
 #endif
 }
diff --git a/expat/lib/xmlrole.c b/expat/lib/xmlrole.c
index 4d3e3e86..3b676a41 100644
--- a/expat/lib/xmlrole.c
+++ b/expat/lib/xmlrole.c
@@ -1220,6 +1220,8 @@ common(PROLOG_STATE *state, int tok) {
 #ifdef XML_DTD
   if (! state->documentEntity && tok == XML_TOK_PARAM_ENTITY_REF)
     return XML_ROLE_INNER_PARAM_ENTITY_REF;
+#else
+  UNUSED_P(tok);
 #endif
   state->handler = error;
   return XML_ROLE_ERROR;