diff --git a/fixed_lib/include/fixedmath/core_ops.h b/fixed_lib/include/fixedmath/core_ops.h
index 21cbfa8..4f119f4 100644
--- a/fixed_lib/include/fixedmath/core_ops.h
+++ b/fixed_lib/include/fixedmath/core_ops.h
@@ -4,6 +4,7 @@
 
 #pragma once
 #include <cmath>
+#include <utility>
 #include "types.h"
 #include "limits.h"
 #include "numbers.h"