--- a/ortools/constraint_solver/constraint_solveri.h	2026-01-09 13:10:50.000000000 +0100
+++ b/ortools/constraint_solver/constraint_solveri.h	2026-10-19 18:09:02.385505065 +0200
@@ -251,8 +251,7 @@ inline uint64_t Hash1(int64_t value) {
 inline uint64_t Hash1(int value) { return Hash1(static_cast<uint32_t>(value)); }
 
 inline uint64_t Hash1(void* const ptr) {
-#if defined(__x86_64__) || defined(_M_X64) || defined(__powerpc64__) || \
-    defined(__aarch64__) || (defined(_MIPS_SZPTR) && (_MIPS_SZPTR == 64))
+#if UINTPTR_MAX == UINT64_MAX
   return Hash1(reinterpret_cast<uint64_t>(ptr));
 #else
   return Hash1(reinterpret_cast<uint32_t>(ptr));