diff --git a/src/arch/x86/isa/decoder/one_byte_opcodes.isa b/src/arch/x86/isa/decoder/one_byte_opcodes.isa
index 4be83bf549..5465776621 100644
--- a/src/arch/x86/isa/decoder/one_byte_opcodes.isa
+++ b/src/arch/x86/isa/decoder/one_byte_opcodes.isa
@@ -264,7 +264,7 @@
             0x2: jb_Jb();
             0x3: jnb_Jb();
             0x4: Inst::JZ(Jb);
-            0x5: jnz_Jb();
+            0x5: Inst::JNZ(Jb);
             0x6: jbe_Jb();
             0x7: jnbe_Jb();
         }
diff --git a/src/arch/x86/isa/insts/control_transfer/jump.py b/src/arch/x86/isa/insts/control_transfer/jump.py
index 9a013a8234..15f00e0838 100644
--- a/src/arch/x86/isa/insts/control_transfer/jump.py
+++ b/src/arch/x86/isa/insts/control_transfer/jump.py
@@ -60,4 +60,11 @@ def macroop JZ_I
     limm t2, imm
     wrip t1, t2, flags=(CZF,)
 };
+
+def macroop JNZ_I
+{
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(nCZF,)
+};
 '''