diff --git i/libclingcon/clingcon/base.hh w/libclingcon/clingcon/base.hh
index 2d449fe..0b5fa17 100644
--- i/libclingcon/clingcon/base.hh
+++ w/libclingcon/clingcon/base.hh
@@ -28,6 +28,7 @@
 #include <clingo.hh>
 #include <optional>
 #include <forward_list>
+#include <limits>
 
 //! @file clingcon/base.hh
 //! Basic data types.
diff --git i/libclingcon/clingcon/util.hh w/libclingcon/clingcon/util.hh
index df4cddd..308259e 100644
--- i/libclingcon/clingcon/util.hh
+++ w/libclingcon/clingcon/util.hh
@@ -30,6 +30,7 @@
 #include <map>
 #include <cstdlib>
 #include <stdexcept>
+#include <limits>
 
 //! @file clingcon/util.hh
 //! Very general utility functions.