diff --git a/src/mips/full-codegen-mips.cc b/src/mips/full-codegen-mips.cc
index 31df789f57..11a67b7adb 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -1705,9 +1705,9 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
         VisitForStackValue(key);
         VisitForStackValue(value);
         if (property->emit_store()) {
-          __ li(a0, Operand(Smi::FromInt(NONE)));  // PropertyAttributes.
+          __ li(a0, Operand(Smi::FromInt(SLOPPY)));  // PropertyAttributes.
           __ push(a0);
-          __ CallRuntime(Runtime::kAddProperty, 4);
+          __ CallRuntime(Runtime::kSetProperty, 4);
         } else {
           __ Drop(3);
         }