diff --git a/src/xenia/base/math.h b/src/xenia/base/math.h
index fb4b9bce6..f72efad6f 100644
--- a/src/xenia/base/math.h
+++ b/src/xenia/base/math.h
@@ -75,13 +75,13 @@ inline uint8_t lzcnt(uint8_t v) {
   DWORD index;
   DWORD mask = v;
   BOOLEAN is_nonzero = _BitScanReverse(&index, mask);
-  return static_cast<uint8_t>(is_nonzero ? int8_t(index - 24) ^ 0x7 : 8);
+  return static_cast<uint8_t>(is_nonzero ? int8_t(index) ^ 0x7 : 8);
 }
 inline uint8_t lzcnt(uint16_t v) {
   DWORD index;
   DWORD mask = v;
   BOOLEAN is_nonzero = _BitScanReverse(&index, mask);
-  return static_cast<uint8_t>(is_nonzero ? int8_t(index - 16) ^ 0xF : 16);
+  return static_cast<uint8_t>(is_nonzero ? int8_t(index) ^ 0xF : 16);
 }
 inline uint8_t lzcnt(uint32_t v) {
   DWORD index;