diff --git a/include/grpc/impl/codegen/compression_types.h b/include/grpc/impl/codegen/compression_types.h
index e35d8929678..f778b005b9b 100644
--- a/include/grpc/impl/codegen/compression_types.h
+++ b/include/grpc/impl/codegen/compression_types.h
@@ -52,7 +52,8 @@ extern "C" {
   "grpc.compression_enabled_algorithms_bitset"
 /** \} */
 
-/** The various compression algorithms supported by gRPC */
+/** The various compression algorithms supported by gRPC (not sorted by
+ * compression level) */
 typedef enum {
   GRPC_COMPRESS_NONE = 0,
   GRPC_COMPRESS_DEFLATE,