diff --git a/reactos/subsys/system/usetup/partlist.h b/reactos/subsys/system/usetup/partlist.h
index 3f79c8d4d02..403c79cac43 100644
--- a/reactos/subsys/system/usetup/partlist.h
+++ b/reactos/subsys/system/usetup/partlist.h
@@ -191,6 +191,9 @@ DrawPartitionList (PPARTLIST List);
 VOID
 SelectPartition(PPARTLIST List, ULONG DiskNumber, ULONG PartitionNumber);
 
+BOOL
+SetMountedDeviceValues(PPARTLIST List);
+
 VOID
 ScrollDownPartitionList (PPARTLIST List);
 
diff --git a/reactos/subsys/system/usetup/registry.h b/reactos/subsys/system/usetup/registry.h
index 0ac2832e45b..c0a14110563 100644
--- a/reactos/subsys/system/usetup/registry.h
+++ b/reactos/subsys/system/usetup/registry.h
@@ -35,6 +35,9 @@ ImportRegistryFile(PWSTR Filename,
 BOOLEAN
 SetInstallPathValue(PUNICODE_STRING InstallPath);
 
+BOOLEAN
+SetMountedDeviceValue(CHAR Letter, ULONG Signature, LARGE_INTEGER StartingOffset);
+
 #endif /* __REGISTRY_H__ */
 
 /* EOF */