diff --git a/folly/compression/Compression.h b/folly/compression/Compression.h
index b278e2df0b8..28bd333748d 100644
--- a/folly/compression/Compression.h
+++ b/folly/compression/Compression.h
@@ -81,7 +81,7 @@ enum class CodecType {
 
   /**
    * Use ZSTD compression.
-   * Levels supported: 1 = fast, ..., 19 = best; default = 3
+   * Levels supported: 1 = fast, ..., 19 = best; default = 1
    * Use ZSTD_FAST for the fastest zstd compression (negative levels).
    * Streaming compression is supported.
    */