diff --git a/lib/Target/R600/R600ISelLowering.cpp b/lib/Target/R600/R600ISelLowering.cpp
index 54ee758cbb6..e5f6b516d11 100644
--- a/lib/Target/R600/R600ISelLowering.cpp
+++ b/lib/Target/R600/R600ISelLowering.cpp
@@ -94,6 +94,7 @@ R600TargetLowering::R600TargetLowering(TargetMachine &TM) :
   setTargetDAGCombine(ISD::EXTRACT_VECTOR_ELT);
   setTargetDAGCombine(ISD::SELECT_CC);
 
+  setBooleanContents(ZeroOrNegativeOneBooleanContent);
   setSchedulingPreference(Sched::VLIW);
 }