diff --git a/tahoe-lafs.nix b/tahoe-lafs.nix
index 466a2dc85c0239acba473637bddf7521350ecc4c..fd34d16edbefc955cb27e03e3cd117d82fd28621 100644
--- a/tahoe-lafs.nix
+++ b/tahoe-lafs.nix
@@ -10,7 +10,8 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "LeastAuthority";
     repo = "tahoe-lafs";
-    # HEAD of integration/storage-economics branch as of July 15th 2019.
+    # HEAD of an integration branch for all of the storage plugin stuff.  Last
+    # updated August 15th 2019.
     rev = "b35a8908f4096ccae35da78b0e7dde96d6cf1667";
     sha256 = "0n289hzx2s1jvspmpz2c5iwl0dvnfc8qbiqfmpbl88ymrjp7p6rr";
   };