diff --git a/trick_source/data_products/DPX/DPM/DPM_parse_tree.cpp b/trick_source/data_products/DPX/DPM/DPM_parse_tree.cpp
index ead513c7..1dbaa6d4 100644
--- a/trick_source/data_products/DPX/DPM/DPM_parse_tree.cpp
+++ b/trick_source/data_products/DPX/DPM/DPM_parse_tree.cpp
@@ -23,7 +23,7 @@ int DPM_parse_tree::Initialize(const char *XMLFileName) {
            exit(0);
        }
 
-       doc = xmlCtxtReadFile( parser_context, XMLFileName, NULL, XML_PARSE_DTDVALID );
+       doc = xmlCtxtReadFile( parser_context, XMLFileName, NULL, 0 );
 
        if (doc == NULL) {
            std::cerr << "ERROR: Parse of XML file \"" << XMLFileName << "\"" << " failed." << std::endl;