diff -u -r diamond-0.8.36/src/dp/scalar_traceback.h diamond-0.8.36-patched/src/dp/scalar_traceback.h
--- diamond-0.8.36/src/dp/scalar_traceback.h	2017-02-06 16:32:05.000000000 +0100
+++ diamond-0.8.36-patched/src/dp/scalar_traceback.h	2017-02-23 15:13:24.000000000 +0100
@@ -19,6 +19,7 @@
 #ifndef SCALAR_TRACEBACK_H_
 #define SCALAR_TRACEBACK_H_
 
+#include <cmath>
 #include <exception>
 #include "../basic/score_matrix.h"
 
@@ -31,7 +32,7 @@
 template<>
 inline bool almost_equal<float>(float x, float y)
 {
-	return abs(x - y) < 0.001f;
+	return std::abs(x - y) < 0.001f;
 }
 
 template<typename _score>