diff --git a/src/arch/x86/isa/decoder/one_byte_opcodes.isa b/src/arch/x86/isa/decoder/one_byte_opcodes.isa
index da7867401..f49059de2 100644
--- a/src/arch/x86/isa/decoder/one_byte_opcodes.isa
+++ b/src/arch/x86/isa/decoder/one_byte_opcodes.isa
@@ -475,7 +475,7 @@
             0x0: loopne_Jb();
             0x1: loope_Jb();
             0x2: loop_Jb();
-            0x3: jcxz_or_jecx_or_jrcx();
+            0x3: Inst::JRCX(Jb);
             0x4: in_Al_Ib();
             0x5: in_eAX_Ib();
             0x6: out_Ib_Al();
diff --git a/src/arch/x86/isa/insts/general_purpose/control_transfer/conditional_jump.py b/src/arch/x86/isa/insts/general_purpose/control_transfer/conditional_jump.py
index b04ca97d6..c2856e630 100644
--- a/src/arch/x86/isa/insts/general_purpose/control_transfer/conditional_jump.py
+++ b/src/arch/x86/isa/insts/general_purpose/control_transfer/conditional_jump.py
@@ -213,4 +213,11 @@ def macroop JNO_I
     limm t2, imm
     wrip t1, t2, flags=(nCOF,)
 };
+
+def macroop JRCX_I
+{
+    rdip t1
+    add t0, t0, rcx, flags=(EZF,), dataSize=asz
+    wripi t1, imm, flags=(CEZF,)
+};
 '''