diff --git a/docs/internals/data-structures.rst b/docs/internals/data-structures.rst
index 637786549..46c5259e4 100644
--- a/docs/internals/data-structures.rst
+++ b/docs/internals/data-structures.rst
@@ -577,7 +577,7 @@ Chunks
 
 The |project_name| chunker uses a rolling hash computed by the Buzhash_ algorithm.
 It triggers (chunks) when the last HASH_MASK_BITS bits of the hash are zero,
-producing chunks of 2^HASH_MASK_BITS Bytes on average.
+producing chunks with a target size of 2^HASH_MASK_BITS Bytes.
 
 Buzhash is **only** used for cutting the chunks at places defined by the
 content, the buzhash value is **not** used as the deduplication criteria (we
@@ -589,7 +589,7 @@ can be used to tune the chunker parameters, the default is:
 
 - CHUNK_MIN_EXP = 19 (minimum chunk size = 2^19 B = 512 kiB)
 - CHUNK_MAX_EXP = 23 (maximum chunk size = 2^23 B = 8 MiB)
-- HASH_MASK_BITS = 21 (statistical medium chunk size ~= 2^21 B = 2 MiB)
+- HASH_MASK_BITS = 21 (target chunk size ~= 2^21 B = 2 MiB)
 - HASH_WINDOW_SIZE = 4095 [B] (`0xFFF`)
 
 The buzhash table is altered by XORing it with a seed randomly generated once