x86: lock nop is a valid instruction. #915
diff --git a/arch/X86/X86DisassemblerDecoder.c b/arch/X86/X86DisassemblerDecoder.c
index a74357f..d6524e1 100644
--- a/arch/X86/X86DisassemblerDecoder.c
+++ b/arch/X86/X86DisassemblerDecoder.c
@@ -2131,6 +2131,9 @@
 				// invalid LOCK
 				return true;
 
+			// nop dword [rax]
+			case X86_NOOPL:
+
 			// DEC
 			case X86_DEC16m:
 			case X86_DEC32m: