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-rw-r--r--gnu/system/mapped-devices.scm2
1 files changed, 1 insertions, 1 deletions
diff --git a/gnu/system/mapped-devices.scm b/gnu/system/mapped-devices.scm
index 8ab861bf73..2959802c96 100644
--- a/gnu/system/mapped-devices.scm
+++ b/gnu/system/mapped-devices.scm
@@ -54,7 +54,7 @@
 (define-record-type* <mapped-device> mapped-device
   make-mapped-device
   mapped-device?
-  (source    mapped-device-source)                ;string
+  (source    mapped-device-source)                ;string | list of strings
   (target    mapped-device-target)                ;string
   (type      mapped-device-type))                 ;<mapped-device-kind>