diff --git a/CEP/DP3/AOFlagger/include/AOFlagger/strategy/algorithms/noisestatistics.h b/CEP/DP3/AOFlagger/include/AOFlagger/strategy/algorithms/noisestatistics.h
index 032fcecc20c3d6b63fedb354065deac7b4538f82..084e320d4d568f61207b3194b90878be354f8831 100644
--- a/CEP/DP3/AOFlagger/include/AOFlagger/strategy/algorithms/noisestatistics.h
+++ b/CEP/DP3/AOFlagger/include/AOFlagger/strategy/algorithms/noisestatistics.h
@@ -23,6 +23,7 @@
 #include <string>
 #include <iostream>
 #include <vector>
+#include <cmath>
 
 class NoiseStatistics {
 	public: