diff --git a/CPPFImdlp.cpp b/CPPFImdlp.cpp
index 46dadeb..5d9a533 100644
--- a/CPPFImdlp.cpp
+++ b/CPPFImdlp.cpp
@@ -1,6 +1,7 @@
 #include <numeric>
 #include <algorithm>
 #include <set>
+#include <cmath>
 #include "CPPFImdlp.h"
 #include "Metrics.h"