diff --git core/src/histogram.cc core/src/histogram.cc
index 8023529..b298fd4 100644
--- core/src/histogram.cc
+++ core/src/histogram.cc
@@ -3,6 +3,7 @@
 #include <algorithm>
 #include <cassert>
 #include <iterator>
+#include <limits>
 #include <numeric>
 #include <ostream>