diff --git a/src/FeatureDataSource.cpp b/src/FeatureDataSource.cpp
index 7bbb96d..1cfbf80 100644
--- a/src/FeatureDataSource.cpp
+++ b/src/FeatureDataSource.cpp
@@ -1,3 +1,5 @@
+#include <math.h>
+
 #include <QApplication>
 #include <QDataStream>
 #include <QFileDialog>