diff --git a/repos/os/src/server/vmm/address_space.h b/repos/os/src/server/vmm/address_space.h
index 5a9c33c7a67..1f367445b09 100644
--- a/repos/os/src/server/vmm/address_space.h
+++ b/repos/os/src/server/vmm/address_space.h
@@ -22,6 +22,8 @@ namespace Vmm {
 
 	struct Address_range;
 	class  Address_space;
+
+	using uint64_t = Genode::uint64_t;
 }