Index: uspace/lib/cpp/src/__bits/test/bitset.cpp
===================================================================
--- uspace/lib/cpp/src/__bits/test/bitset.cpp	(revision 2e328c3f22289158f5d1889f4bacef60637d7da6)
+++ uspace/lib/cpp/src/__bits/test/bitset.cpp	(revision a853075af6495cc4ad987493246270c01a25115c)
@@ -92,8 +92,8 @@
         );
 
-        std::bitset<64> b4{0xABCD'DCBA'DEAD'BEEF};
+        std::bitset<64> b4{0xABCD'DCBA'DEAD'BEEFULL};
         test_eq(
             "from hex to number equivalence",
-            b4.to_ulong(), 0xABCD'DCBA'DEAD'BEEF
+            b4.to_ulong(), static_cast<unsigned long>(0xABCD'DCBA'DEAD'BEEFULL)
         );