diff --git a/src/mips/builtins-mips.cc b/src/mips/builtins-mips.cc
index 30058d1d53..420e2ca3b4 100644
--- a/src/mips/builtins-mips.cc
+++ b/src/mips/builtins-mips.cc
@@ -1575,20 +1575,20 @@ void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
     // Adjust for return address and receiver.
     __ Addu(a0, a0, Operand(2 * kPointerSize));
     // Compute copy end address. Also adjust for return address.
-    __ Addu(t1, fp, kPointerSize);
+    __ Addu(t3, fp, kPointerSize);
 
     // Copy the arguments (including the receiver) to the new stack frame.
     // a0: copy start address
     // a1: function
     // a2: expected number of arguments
     // a3: code entry to call
-    // t1: copy end address
+    // t3: copy end address
     Label copy;
     __ bind(&copy);
     __ lw(t0, MemOperand(a0));  // Adjusted above for return addr and receiver.
     __ push(t0);
     __ Subu(a0, a0, kPointerSize);
-    __ Branch(&copy, ne, a0, Operand(t1));
+    __ Branch(&copy, ne, a0, Operand(t3));
 
     // Fill the remaining expected arguments with undefined.
     // a1: function
diff --git a/src/mips/full-codegen-mips.cc b/src/mips/full-codegen-mips.cc
index 31b90663bc..b98831af17 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -147,11 +147,11 @@ void FullCodeGenerator::Generate(CompilationInfo* info) {
   }
 #endif
 
-  // Strict mode functions need to replace the receiver with undefined
-  // when called as functions (without an explicit receiver
-  // object). t1 is zero for method calls and non-zero for function
-  // calls.
-  if (info->is_strict_mode()) {
+  // Strict mode functions and builtins need to replace the receiver
+  // with undefined when called as functions (without an explicit
+  // receiver object). t1 is zero for method calls and non-zero for
+  // function calls.
+  if (info->is_strict_mode() || info->is_native()) {
     Label ok;
     __ Branch(&ok, eq, t1, Operand(zero_reg));
     int receiver_offset = scope()->num_parameters() * kPointerSize;