diff --git a/lib/Target/X86/X86Instr64bit.td b/lib/Target/X86/X86Instr64bit.td
index 420d2db02da..b6a2c0522ab 100644
--- a/lib/Target/X86/X86Instr64bit.td
+++ b/lib/Target/X86/X86Instr64bit.td
@@ -1335,7 +1335,7 @@ def CMOVNO64rm : RI<0x41, MRMSrcMem,       // if !overflow, GR64 = [mem64]
 
 // Use sbb to materialize carry flag into a GPR.
 let Defs = [EFLAGS], Uses = [EFLAGS], isCodeGenOnly = 1 in
-def SETB_C64r : RI<0x19, MRMDestReg, (outs GR64:$dst), (ins),
+def SETB_C64r : RI<0x19, MRMInitReg, (outs GR64:$dst), (ins),
                   "sbb{q}\t$dst, $dst",
                  [(set GR64:$dst, (zext (X86setcc_c X86_COND_B, EFLAGS)))]>;