diff --git a/Source/Core/Common/Arm64Emitter.cpp b/Source/Core/Common/Arm64Emitter.cpp
index ae07647339..42cb60ed83 100644
--- a/Source/Core/Common/Arm64Emitter.cpp
+++ b/Source/Core/Common/Arm64Emitter.cpp
@@ -27,7 +27,6 @@ namespace Arm64Gen
 namespace
 {
 const int kWRegSizeInBits = 32;
-const int kXRegSizeInBits = 64;
 
 uint64_t LargestPowerOf2Divisor(uint64_t value)
 {