diff --git a/cpc/include/compression_data.hpp b/cpc/include/compression_data.hpp
index 0889b479..8444fa72 100644
--- a/cpc/include/compression_data.hpp
+++ b/cpc/include/compression_data.hpp
@@ -22,6 +22,8 @@
 #ifndef CPC_COMPRESSION_DATA_HPP_
 #define CPC_COMPRESSION_DATA_HPP_
 
+#include <cstdint>
+
 namespace datasketches {
 
 /*
diff --git a/hll/include/coupon_iterator.hpp b/hll/include/coupon_iterator.hpp
index cd62c827..fff56cd2 100644
--- a/hll/include/coupon_iterator.hpp
+++ b/hll/include/coupon_iterator.hpp
@@ -20,6 +20,9 @@
 #ifndef _INTARRAYPAIRITERATOR_HPP_
 #define _INTARRAYPAIRITERATOR_HPP_
 
+#include <cstdint>
+#include <iterator>
+
 namespace datasketches {
 
 template<typename A>