diff --git a/src/nfagraph/ng_literal_decorated.cpp b/src/nfagraph/ng_literal_decorated.cpp
index 3ba810f9..1a8cafac 100644
--- a/src/nfagraph/ng_literal_decorated.cpp
+++ b/src/nfagraph/ng_literal_decorated.cpp
@@ -45,8 +45,6 @@
 #include <memory>
 #include <sstream>
 
-#include <boost/graph/depth_first_search.hpp>
-
 using namespace std;
 
 namespace ue2 {