diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index b42faa0a095..7f3aa499bcd 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -88,6 +88,7 @@ X86TargetLowering::X86TargetLowering(TargetMachine &TM)
   setOperationAction(ISD::BRTWOWAY_CC      , MVT::Other, Expand);
   setOperationAction(ISD::MEMMOVE          , MVT::Other, Expand);
   setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16  , Expand);
+  setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8   , Expand);
   setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1   , Expand);
   setOperationAction(ISD::FP_ROUND_INREG   , MVT::f32  , Expand);
   setOperationAction(ISD::SEXTLOAD         , MVT::i1   , Expand);