diff --git a/src/arch/x86/isa/insts/no_operation.py b/src/arch/x86/isa/insts/no_operation.py
index 1a287aea7..306ee2797 100644
--- a/src/arch/x86/isa/insts/no_operation.py
+++ b/src/arch/x86/isa/insts/no_operation.py
@@ -53,8 +53,9 @@
 #
 # Authors: Gabe Black
 
-microcode = ""
-#let {{
-#   class NOP(Inst):
-# 	"GenFault ${new UnimpInstFault}"
-#}};
+microcode = '''
+def macroop NOP
+{
+    fault "NoFault"
+};
+'''