diff -r 036b431e70ee -r c2ba65ea8d31 src/hash_key.c
--- a/src/hash_key.c	Tue Oct 29 16:01:10 2024 +0100
+++ b/src/hash_key.c	Tue Oct 29 16:08:37 2024 +0100
@@ -40,7 +40,7 @@
 
     unsigned m = 0x5bd1e995;
     unsigned r = 24;
-    unsigned h = 25 ^ len;
+    unsigned h = 25 ^ (unsigned) len;
     unsigned i = 0;
     while (len >= 4) {
         unsigned k = data[i + 0] & 0xFF;