diff --git a/src/speedtestutil.cpp b/src/speedtestutil.cpp
index b02e257..352715d 100644
--- a/src/speedtestutil.cpp
+++ b/src/speedtestutil.cpp
@@ -1,5 +1,6 @@
 #include <fstream>
 #include <algorithm>
+#include <cmath>
 
 #include <time.h>