diff --git a/headers/private/storage/DiskDeviceDefs.h b/headers/private/storage/DiskDeviceDefs.h
index 26f40af912..ad3bfdb5f5 100644
--- a/headers/private/storage/DiskDeviceDefs.h
+++ b/headers/private/storage/DiskDeviceDefs.h
@@ -34,6 +34,23 @@ enum {
 	B_PARTITION_UNRECOGNIZED,
 };
 
+// partition change flags
+enum {
+	B_PARTITION_CHANGED_OFFSET				= 0x0001,
+	B_PARTITION_CHANGED_SIZE				= 0x0002,
+	B_PARTITION_CHANGED_BLOCK_SIZE			= 0x0004,
+	B_PARTITION_CHANGED_STATUS				= 0x0008,
+	B_PARTITION_CHANGED_FLAGS				= 0x0010,
+	B_PARTITION_CHANGED_VOLUME				= 0x0020,
+	B_PARTITION_CHANGED_NAME				= 0x0040,
+	B_PARTITION_CHANGED_CONTENT_NAME		= 0x0080,
+	B_PARTITION_CHANGED_TYPE				= 0x0100,
+	B_PARTITION_CHANGED_CONTENT_TYPE		= 0x0200,
+	B_PARTITION_CHANGED_PARAMETERS			= 0x0400,
+	B_PARTITION_CHANGED_CONTENT_PARAMETERS	= 0x0800,
+	B_PARTITION_CHANGED_CHILDREN			= 0x1000,
+};
+
 // disk device flags
 enum {
 	B_DISK_DEVICE_REMOVABLE		= 0x01,