diff -r c9a86bd9e361 -r 556e4e7608b1 src/hash_key.c
--- a/src/hash_key.c	Wed Sep 03 23:10:36 2025 +0200
+++ b/src/hash_key.c	Sat Sep 06 11:57:17 2025 +0200
@@ -62,14 +62,14 @@
     switch (len) {
         case 3:
             h ^= (data[i + 2] & 0xFF) << 16;
-                    __attribute__((__fallthrough__));
+            cx_attr_fallthrough;
         case 2:
             h ^= (data[i + 1] & 0xFF) << 8;
-                    __attribute__((__fallthrough__));
+            cx_attr_fallthrough;
         case 1:
             h ^= (data[i + 0] & 0xFF);
             h *= m;
-                    __attribute__((__fallthrough__));
+            cx_attr_fallthrough;
         default: // do nothing
             ;
     }