diff --git a/xs.h b/xs.h
index e240ce7..4da0d6f 100644
--- a/xs.h
+++ b/xs.h
@@ -1322,7 +1322,7 @@ unsigned int xs_hash_func(const char *data, int size)
     int n;
 
     for (n = 0; n < size; n++) {
-        hash ^= data[n];
+        hash ^= (unsigned char)data[n];
         hash *= 111111111;
     }
 
diff --git a/xs_version.h b/xs_version.h
index 2e86334..62f2aca 100644
--- a/xs_version.h
+++ b/xs_version.h
@@ -1 +1 @@
-/* e148ab08d5a55ac7bd30ff900f5eb048a57e21af 2024-05-27T05:33:01+02:00 */
+/* efb85fa3768a86f1609c520f0c86e8f87239b695 2024-05-27T08:24:40+02:00 */