diff --git a/regen/opcode.pl b/regen/opcode.pl
index 1dbd77aca1cc..ba178b9fab20 100755
--- a/regen/opcode.pl
+++ b/regen/opcode.pl
@@ -1028,7 +1028,7 @@ sub op_index {
         $max;
     };
 
-    align $align_at, "[${\ op_enum $_[0] }]";
+    align $align_at, "[+${\ op_enum $_[0] }]";
 }
 
 sub generate_opcode_h {