diff --git a/lib/Target/X86/X86InstrMMX.td b/lib/Target/X86/X86InstrMMX.td
index 744af50e3e4..103f60c2226 100644
--- a/lib/Target/X86/X86InstrMMX.td
+++ b/lib/Target/X86/X86InstrMMX.td
@@ -117,9 +117,6 @@ def MMX_MOVD64mr : MMXI<0x7E, MRMDestMem, (outs), (ins i32mem:$dst, VR64:$src),
                         "movd\t{$src, $dst|$dst, $src}", []>;
 def MMX_MOVD64grr : MMXI<0x7E, MRMDestReg, (outs), (ins GR32:$dst, VR64:$src),
                         "movd\t{$src, $dst|$dst, $src}", []>;
-def MMX_MOVQ64gmr : MMXRI<0x7F, MRMDestMem, (outs), 
-                         (ins i64mem:$dst, VR64:$src),
-                         "movq\t{$src, $dst|$dst, $src}", []>;
 
 let neverHasSideEffects = 1 in
 def MMX_MOVD64to64rr : MMXRI<0x6E, MRMSrcReg, (outs VR64:$dst), (ins GR64:$src),