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-rw-r--r--gnu/system/file-systems.scm2
1 files changed, 2 insertions, 0 deletions
diff --git a/gnu/system/file-systems.scm b/gnu/system/file-systems.scm
index 3bd072a0bc..bbac23fbdf 100644
--- a/gnu/system/file-systems.scm
+++ b/gnu/system/file-systems.scm
@@ -417,6 +417,8 @@ a bind mount."
%network-configuration-files))
(define (file-system-type-predicate type)
+ "Return a predicate that, when passed a file system, returns #t if that file
+system has the given TYPE."
(lambda (fs)
(string=? (file-system-type fs) type)))