diff --git a/src/xenia/cpu/x64/x64_emit_altivec.cc b/src/xenia/cpu/x64/x64_emit_altivec.cc
index c208cd9a1..647817843 100644
--- a/src/xenia/cpu/x64/x64_emit_altivec.cc
+++ b/src/xenia/cpu/x64/x64_emit_altivec.cc
@@ -391,7 +391,7 @@ static void __emulated_stvlx(uint64_t addr, __m128i vd) {
   const size_t size = 16 - eb;
   uint8_t* p = (uint8_t*)addr;
   for (size_t i = 0; i < size; i++) {
-    p[i] = vd.m128i_u8[size - i];
+    p[i] = vd.m128i_u8[15 - i];
   }
 }
 int InstrEmit_stvlx_(X64Emitter& e, X86Compiler& c, InstrData& i, uint32_t vd, uint32_t ra, uint32_t rb) {
@@ -437,7 +437,7 @@ static void __emulated_stvrx(uint64_t addr, __m128i vd) {
   uint8_t* p = (uint8_t*)addr;
   // Note that if the input is already 16b aligned no bytes are stored.
   for (size_t i = 0; i < size; i++) {
-    p[i + (size - 1 - i)] = vd.m128i_u8[i];
+    p[size - 1 - i] = vd.m128i_u8[i];
   }
 }
 int InstrEmit_stvrx_(X64Emitter& e, X86Compiler& c, InstrData& i, uint32_t vd, uint32_t ra, uint32_t rb) {