diff --git a/osbase/build/fsspec/BUILD.bazel b/osbase/build/fsspec/BUILD.bazel
index 2b17b8d..0cb2c55 100644
--- a/osbase/build/fsspec/BUILD.bazel
+++ b/osbase/build/fsspec/BUILD.bazel
@@ -7,7 +7,6 @@
     name = "spec_proto_lint_test",
     except_rules = [
         "PACKAGE_VERSION_SUFFIX",
-        "ENUM_VALUE_PREFIX",  # TODO: evaluate correctness
         "ENUM_ZERO_VALUE_SUFFIX",  # TODO: evaluate correctness
     ],
     protos = [":spec_proto"],
diff --git a/osbase/build/fsspec/spec.proto b/osbase/build/fsspec/spec.proto
index 25963a1..3c98fdb 100644
--- a/osbase/build/fsspec/spec.proto
+++ b/osbase/build/fsspec/spec.proto
@@ -76,9 +76,9 @@
   string path = 1;
 
   enum Type {
-    CHARACTER_DEV = 0;
-    BLOCK_DEV = 1;
-    FIFO = 2;
+    TYPE_CHARACTER_DEV = 0;
+    TYPE_BLOCK_DEV = 1;
+    TYPE_FIFO = 2;
   }
 
   // Type of special file.