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diff --git a/ripser/ripser.cpp b/ripser/ripser.cpp
index f2b7531..2c225c5 100644
--- a/ripser/ripser.cpp
+++ b/ripser/ripser.cpp
@@ -46,6 +46,7 @@ derivative works thereof, in binary and source code form.
 #include <iomanip>
 #include <iostream>
 #include <iterator>
+#include <limits>
 #include <numeric>
 #include <queue>
 #include <sstream>