diff --git a/src/enc/near_lossless.c b/src/enc/near_lossless.c
index 9bc0f0e7..23464596 100644
--- a/src/enc/near_lossless.c
+++ b/src/enc/near_lossless.c
@@ -126,12 +126,12 @@ static void NearLossless(int xsize, int ysize, uint32_t* argb,
 
 static int QualityToLimitBits(int quality) {
   // quality mapping:
-  //  0..19 -> 5
-  //  0..39 -> 4
-  //  0..59 -> 3
-  //  0..79 -> 2
-  //  0..99 -> 1
-  //  100   -> 0
+  //   0..19 -> 5
+  //  20..39 -> 4
+  //  40..59 -> 3
+  //  60..79 -> 2
+  //  80..99 -> 1
+  //  100    -> 0
   return MAX_LIMIT_BITS - quality / 20;
 }
 
diff --git a/src/webp/encode.h b/src/webp/encode.h
index c382ea76..9291b719 100644
--- a/src/webp/encode.h
+++ b/src/webp/encode.h
@@ -134,8 +134,8 @@ struct WebPConfig {
   int thread_level;       // If non-zero, try and use multi-threaded encoding.
   int low_memory;         // If set, reduce memory usage (but increase CPU use).
 
-  int near_lossless;      // Near lossless encoding [0 = off(default) .. 100].
-                          // This feature is experimental.
+  int near_lossless;      // Near lossless encoding [0 = max loss .. 100 = off
+                          // (default)].
   int exact;              // if non-zero, preserve the exact RGB values under
                           // transparent area. Otherwise, discard this invisible
                           // RGB information for better compression. The default