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-rw-r--r--src/libstore/store-api.hh3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh
index 1c6f737285d6..bac2f6b9a26c 100644
--- a/src/libstore/store-api.hh
+++ b/src/libstore/store-api.hh
@@ -56,7 +56,8 @@ struct GCOptions
     /* For `gcDeleteSpecific', the paths to delete. */
     PathSet pathsToDelete;
 
-    /* Stop after at least `maxFreed' bytes have been freed. */
+    /* Stop after at least `maxFreed' bytes have been freed.  0 means
+       no limit. */
     unsigned long long maxFreed;
 
     /* Stop after the number of hard links to the Nix store directory