diff --git a/src/arch/x86/registers.hh b/src/arch/x86/registers.hh
index c041a07f97..fdd6d6b06a 100644
--- a/src/arch/x86/registers.hh
+++ b/src/arch/x86/registers.hh
@@ -83,14 +83,6 @@ const int NumVecPredRegs = 1;  // Not applicable to x86
 //There is no such register in X86
 const int ZeroReg = NUM_INTREGS;
 const int StackPointerReg = INTREG_RSP;
-//X86 doesn't seem to have a link register
-const int ReturnAddressReg = 0;
-const int ReturnValueReg = INTREG_RAX;
-const int FramePointerReg = INTREG_RBP;
-
-// Some OS syscalls use a second register (rdx) to return a second
-// value
-const int SyscallPseudoReturnReg = INTREG_RDX;
 
 // Not applicable to x86
 using VecElem = ::DummyVecElem;