diff --git a/src/settings.cpp b/src/settings.cpp
index 12e0a80509..d419cab06f 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -430,9 +430,11 @@ void read_settings_xml()
     if (check_for_node(node, "file")) {
       auto path = get_node_value(node, "file", false, true);
       model::external_sources.push_back(make_unique<FileSource>(path));
+#ifdef OPENMC_MCPL
     } else if (check_for_node(node, "mcpl")) {
       auto path = get_node_value(node, "mcpl", false, true);
       model::external_sources.push_back(make_unique<MCPLFileSource>(path));
+#endif
     } else if (check_for_node(node, "library")) {
       // Get shared library path and parameters
       auto path = get_node_value(node, "library", false, true);