diff --git a/emory/chunk/find.hpp b/emory/chunk/find.hpp
index 64f4aaf..3e54762 100644
--- a/emory/chunk/find.hpp
+++ b/emory/chunk/find.hpp
@@ -37,6 +37,7 @@ namespace emory::chunk {
         digest_type const mask = ~digest_type (0) >> (sizeof (digest_type) * 8 - p.bits);
 
         u64 hash_state = 0;
+        static u64 constexpr hash_shift = 1;
         auto start = src.begin ();
 
         // Scan the entire source memory region
@@ -54,8 +55,8 @@ namespace emory::chunk {
                 if (cursor < start + p.maximum) {
                     // Rotate the buzhash state if we haven't hit a marker.
                     if (likely (hash_state & mask)) {
-                        hash_state = cruft::rotatel (hash_state, 1)
-                                   ^ cruft::rotatel (u64 (*(cursor - p.window)), p.window)
+                        hash_state = cruft::rotatel (hash_state, hash_shift)
+                                   ^ cruft::rotatel (u64 (*(cursor - p.window)), p.window * hash_shift)
                                    ^ *cursor;
                         continue;
                     }