diff --git a/include/util/coordinate.hpp b/include/util/coordinate.hpp
index bb03c9107..578b43ff2 100644
--- a/include/util/coordinate.hpp
+++ b/include/util/coordinate.hpp
@@ -33,6 +33,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <boost/numeric/conversion/cast.hpp>
 
 #include <cstddef>
+#include <cstdint>
 #include <iosfwd> //for std::ostream
 #include <sstream>
 #include <string>
diff --git a/include/util/opening_hours.hpp b/include/util/opening_hours.hpp
index 07b18836a..45af42203 100644
--- a/include/util/opening_hours.hpp
+++ b/include/util/opening_hours.hpp
@@ -3,6 +3,7 @@
 
 #include <boost/date_time/gregorian/gregorian.hpp>
 
+#include <cstdint>
 #include <string>
 #include <vector>
 
diff --git a/include/util/query_heap.hpp b/include/util/query_heap.hpp
index 463323efe..de43ebd9e 100644
--- a/include/util/query_heap.hpp
+++ b/include/util/query_heap.hpp
@@ -6,6 +6,7 @@
 #include <boost/optional.hpp>
 
 #include <algorithm>
+#include <cstdint>
 #include <limits>
 #include <map>
 #include <unordered_map>