Index: uspace/lib/cpp/include/__bits/adt/bitset.hpp
===================================================================
--- uspace/lib/cpp/include/__bits/adt/bitset.hpp	(revision 56210a7aca94cc904bb253efade72fb9a4cc1a40)
+++ uspace/lib/cpp/include/__bits/adt/bitset.hpp	(revision 6c894b471963dae81f6b8e96281bf270bb8814fa)
@@ -42,4 +42,13 @@
     class bitset
     {
+        private:
+            /**
+             * While this might be a bit more wasteful
+             * than using unsigned or unsigned long,
+             * it will make parts of out code easier
+             * to read.
+             */
+            using data_type = unsigned long long;
+
         public:
             class reference
@@ -365,12 +374,4 @@
 
         private:
-            /**
-             * While this might be a bit more wasteful
-             * than using unsigned or unsigned long,
-             * it will make parts of out code easier
-             * to read.
-             */
-            using data_type = unsigned long long;
-
             static constexpr size_t bits_in_data_type_ = sizeof(data_type) * 8;
             static constexpr size_t data_size_ = N / bits_in_data_type_ + 1;