diff --git a/FDTD/engine.cpp b/FDTD/engine.cpp
index 7dffd84..77513b8 100644
--- a/FDTD/engine.cpp
+++ b/FDTD/engine.cpp
@@ -1,5 +1,4 @@
 #include "engine.h"
-#include "tools/AdrOp.h"
 #include "tools/array_ops.h"
 
 Engine::Engine(Operator* op)