Index: uspace/lib/cpp/src/internal/unwind.cpp
===================================================================
--- uspace/lib/cpp/src/internal/unwind.cpp	(revision ef9d098804a0dd5c42f206398eba55ea95569741)
+++ uspace/lib/cpp/src/internal/unwind.cpp	(revision b1cd380cbb7bcbf6d119599dc443c6b58ead8a14)
@@ -26,4 +26,6 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
+
+#include <cstdint>
 
 namespace __cxxabiv1
@@ -59,4 +61,13 @@
     /* Opaque structure. */
     struct _Unwind_Context;
+
+    using _Unwind_Action = int;
+    namespace
+    {
+        const _Unwind_Action _UA_SEARCH_PHASE  = 1;
+        const _Unwind_Action _UA_CLEANUP_PHASE = 2;
+        const _Unwind_Action _UA_HANDLER_FRAME = 4;
+        const _Unwind_Action _UA_FORCE_HANDLER = 8;
+    }
 
     /**