1 files changed, 1 insertions, 0 deletions

diff --git a/ripser.cpp b/ripser.cpp
index 30697a9..b850972 100644
--- a/ripser.cpp
+++ b/ripser.cpp
@@ -10,6 +10,7 @@
 
 //#define USE_GOOGLE_HASHMAP
 
+#include <algorithm>
 #include <iostream>
 #include <fstream>
 #include <cassert>