diff --git a/PAM/ssh/include/rublon/std_experimental.hpp b/PAM/ssh/include/rublon/std_experimental.hpp
index 949bc0c..0716325 100644
--- a/PAM/ssh/include/rublon/std_experimental.hpp
+++ b/PAM/ssh/include/rublon/std_experimental.hpp
@@ -5,6 +5,7 @@
 
 #include <experimental/filesystem>
 #include <experimental/map>
+#include <experimental/unordered_map>
 #include <experimental/memory_resource>
 #include <experimental/optional>
 #include <experimental/set>