diff --git a/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp b/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp
index 05dff4094f2d..21069905a655 100755
--- a/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp
+++ b/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp
@@ -53,6 +53,7 @@ bool X86ATTAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
       printMachineInstruction(II);
     }
   }
+  O << "\t.size " << CurrentFnName << ", .-" << CurrentFnName << "\n";
 
   // We didn't modify anything.
   return false;