diff --git a/libs/gamecode/opcodes.py b/libs/gamecode/opcodes.py
index a07714d88..7c0758a64 100644
--- a/libs/gamecode/opcodes.py
+++ b/libs/gamecode/opcodes.py
@@ -361,13 +361,14 @@ scale_formats = {
     },
 }
 shiftops_formats = {
-    "opcode": "OP_{op_shift[u*2+r].upper()}_{shift_type[u*2+t]}_{ss+1}",
-    "mnemonic": "{op_shift[u*2+r]}.{shift_type[u*2+t]}",
+    "opcode": "OP_{mn_shift[u*2+r].upper()}_{shift_type[u*2+t]}_{ss+1}",
+    "mnemonic": "{mn_shift[u*2+r]}.{shift_type[u*2+t]}",
     "opname": "{op_shift[u*2+r]}",
     "widths": "{ss+1}, {ss+1}, {ss+1}",
     "types": "{shift_types[t][u]}, {shift_types[t][0]}, {shift_types[t][u]}",
     "args": {
-        "op_shift": ["shl", "asr", "shl", "shr"],
+        "mn_shift": ["shl", "asr", "shl", "shr"],
+        "op_shift": ["shl", "shr", "shl", "shr"],
         "shift_type": ['I', 'L', 'u', 'U'],
         "shift_types": [
             ["ev_int", "ev_uint"],