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-rw-r--r--gnu/system/file-systems.scm5
1 files changed, 4 insertions, 1 deletions
diff --git a/gnu/system/file-systems.scm b/gnu/system/file-systems.scm
index 4760821840..356b4826b4 100644
--- a/gnu/system/file-systems.scm
+++ b/gnu/system/file-systems.scm
@@ -45,6 +45,7 @@
             mapped-device-source
             mapped-device-target
             mapped-device-type
+            mapped-device-needed-for-boot?
 
             mapped-device-kind
             mapped-device-kind?
@@ -157,7 +158,9 @@ file system."
   mapped-device?
   (source    mapped-device-source)                ;string
   (target    mapped-device-target)                ;string
-  (type      mapped-device-type))                 ;<mapped-device-kind>
+  (type      mapped-device-type)                  ;<mapped-device-kind>
+  (needed-for-boot? mapped-device-needed-for-boot? ;Boolean
+                    (default #f)))
 
 (define-record-type* <mapped-device-type> mapped-device-kind
   make-mapped-device-kind