diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index d9b0ef20a3e..ca812c84bd6 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -7483,7 +7483,7 @@ SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
 SDValue
 X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
                                            SelectionDAG &DAG) const {
-  assert(Subtarget->isTargetCygMing() || Subtarget->isTargetWindows() &&
+  assert((Subtarget->isTargetCygMing() || Subtarget->isTargetWindows()) &&
          "This should be used only on Windows targets");
   DebugLoc dl = Op.getDebugLoc();