diff --git a/src/optimization/Cancellation.cpp b/src/optimization/Cancellation.cpp
deleted file mode 100644
index 87093844..00000000
--- a/src/optimization/Cancellation.cpp
+++ /dev/null
@@ -1,6 +0,0 @@
-#include <atomic>
-#include <optimization/Cancellation.h>
-#pragma once
-namespace trajopt {
-  Cancellation::flag(0);
-}
\ No newline at end of file