diff --git a/include/boost/histogram/accumulators/ostream.hpp b/include/boost/histogram/accumulators/ostream.hpp
index eb6e8aa5..0ff1ab29 100644
--- a/include/boost/histogram/accumulators/ostream.hpp
+++ b/include/boost/histogram/accumulators/ostream.hpp
@@ -9,7 +9,7 @@
 
 #include <boost/histogram/detail/counting_streambuf.hpp>
 #include <boost/histogram/fwd.hpp>
-#include <iosfwd>
+#include <ios>
 
 /**
   \file boost/histogram/accumulators/ostream.hpp
diff --git a/include/boost/histogram/detail/static_if.hpp b/include/boost/histogram/detail/static_if.hpp
index 0f12a022..a7e8ba94 100644
--- a/include/boost/histogram/detail/static_if.hpp
+++ b/include/boost/histogram/detail/static_if.hpp
@@ -8,6 +8,7 @@
 #define BOOST_HISTOGRAM_DETAIL_STATIC_IF_HPP
 
 #include <type_traits>
+#include <utility>
 
 namespace boost {
 namespace histogram {
diff --git a/include/boost/histogram/ostream.hpp b/include/boost/histogram/ostream.hpp
index 45d9ac05..75e8d11a 100644
--- a/include/boost/histogram/ostream.hpp
+++ b/include/boost/histogram/ostream.hpp
@@ -18,6 +18,7 @@
 #include <boost/histogram/indexed.hpp>
 #include <cmath>
 #include <iomanip>
+#include <ios>
 #include <limits>
 #include <numeric>
 #include <ostream>