1 files changed, 1 insertions, 0 deletions

diff --git a/ripser.cpp b/ripser.cpp
index 70430eb..51b3d9e 100644
--- a/ripser.cpp
+++ b/ripser.cpp
@@ -46,6 +46,7 @@
 #include <algorithm>
 #include <cassert>
 #include <chrono>
+#include <cmath>
 #include <fstream>
 #include <iostream>
 #include <numeric>