diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index f821a77caa5..b29187b154f 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -1361,9 +1361,9 @@ void CWriter::visitBinaryOperator(Instruction &I) {
   // If this is a negation operation, print it out as such.  For FP, we don't
   // want to print "-0.0 - X".
   if (BinaryOperator::isNeg(&I)) {
-    Out << "-";
+    Out << "-(";
     writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
-
+    Out << ")";
   } else {
     writeOperand(I.getOperand(0));
 
diff --git a/lib/Target/CBackend/Writer.cpp b/lib/Target/CBackend/Writer.cpp
index f821a77caa5..b29187b154f 100644
--- a/lib/Target/CBackend/Writer.cpp
+++ b/lib/Target/CBackend/Writer.cpp
@@ -1361,9 +1361,9 @@ void CWriter::visitBinaryOperator(Instruction &I) {
   // If this is a negation operation, print it out as such.  For FP, we don't
   // want to print "-0.0 - X".
   if (BinaryOperator::isNeg(&I)) {
-    Out << "-";
+    Out << "-(";
     writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
-
+    Out << ")";
   } else {
     writeOperand(I.getOperand(0));