diff --git a/x11/rio/files/patch-cargo-crates_simdutf-0.7.0_cpp_simdutf.h b/x11/rio/files/patch-cargo-crates_simdutf-0.7.0_cpp_simdutf.h
new file mode 100644
index 000000000000..ede02243dd22
--- /dev/null
+++ b/x11/rio/files/patch-cargo-crates_simdutf-0.7.0_cpp_simdutf.h
@@ -0,0 +1,11 @@
+--- cargo-crates/simdutf-0.7.0/cpp/simdutf.h.orig	2026-09-18 12:23:35 UTC
++++ cargo-crates/simdutf-0.7.0/cpp/simdutf.h
+@@ -165,7 +165,7 @@
+ #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__)