diff --git a/src/ia32/codegen-ia32.cc b/src/ia32/codegen-ia32.cc
index d64836bca2..938c8e6fca 100644
--- a/src/ia32/codegen-ia32.cc
+++ b/src/ia32/codegen-ia32.cc
@@ -5341,8 +5341,8 @@ void CodeGenerator::VisitUnaryOperation(UnaryOperation* node) {
     switch (op) {
       case Token::SUB: {
         bool overwrite =
-            (node->AsBinaryOperation() != NULL &&
-             node->AsBinaryOperation()->ResultOverwriteAllowed());
+          (node->expression()->AsBinaryOperation() != NULL &&
+           node->expression()->AsBinaryOperation()->ResultOverwriteAllowed());
         UnarySubStub stub(overwrite);
         // TODO(1222589): remove dependency of TOS being cached inside stub
         Result operand = frame_->Pop();
diff --git a/src/x64/codegen-x64.cc b/src/x64/codegen-x64.cc
index 3acdc421dd..d72257e96f 100644
--- a/src/x64/codegen-x64.cc
+++ b/src/x64/codegen-x64.cc
@@ -3092,8 +3092,8 @@ void CodeGenerator::VisitUnaryOperation(UnaryOperation* node) {
 
       case Token::SUB: {
         bool overwrite =
-            (node->AsBinaryOperation() != NULL &&
-             node->AsBinaryOperation()->ResultOverwriteAllowed());
+          (node->expression()->AsBinaryOperation() != NULL &&
+           node->expression()->AsBinaryOperation()->ResultOverwriteAllowed());
         UnarySubStub stub(overwrite);
         // TODO(1222589): remove dependency of TOS being cached inside stub
         Result operand = frame_->Pop();