diff --git a/emory/chunk/params.hpp b/emory/chunk/params.hpp
index 2a970ca..f0bfed6 100644
--- a/emory/chunk/params.hpp
+++ b/emory/chunk/params.hpp
@@ -12,8 +12,11 @@
 
 namespace emory::chunk {
     struct params {
+        /// The number of hash bits that must be zero to trigger detection.
         std::size_t bits;
+        /// The number of bytes history the hash uses.
         std::size_t window;
+        /// The minimum number of bytes for a matching region.
         std::ptrdiff_t minimum;
     };
 }