--- cargo-crates/v8-150.4.0/third_party/simdutf/simdutf.h.orig	2026-09-16 10:01:02 UTC
+++ cargo-crates/v8-150.4.0/third_party/simdutf/simdutf.h
@@ -166,7 +166,7 @@
 #elif defined(__aarch64__) || defined(_M_ARM64) || defined(_M_ARM64EC)
   #define SIMDUTF_IS_ARM64 1
 #elif defined(__PPC64__) || defined(_M_PPC64)
-  #if defined(__VEC__) && defined(__ALTIVEC__)
+  #if defined(__VEC__) && defined(__ALTIVEC__) && defined(__POWER8_VECTOR__)
     #define SIMDUTF_IS_PPC64 1
   #endif
 #elif defined(__s390__)