| Index: src/flag-definitions.h | 
| diff --git a/src/flag-definitions.h b/src/flag-definitions.h | 
| index 975a607ba902cbf3e719909f40e27360810b9bd8..ec7613ebb88fb11dd830f1511627376a0bbcc7c5 100644 | 
| --- a/src/flag-definitions.h | 
| +++ b/src/flag-definitions.h | 
| @@ -532,6 +532,8 @@ DEFINE_BOOL(wasm_simd_prototype, false, | 
| "enable prototype simd opcodes for wasm") | 
| DEFINE_BOOL(wasm_eh_prototype, false, | 
| "enable prototype exception handling opcodes for wasm") | 
| +DEFINE_BOOL(wasm_mv_prototype, false, | 
| +            "enable prototype multi-value support for wasm") | 
|  | 
| DEFINE_BOOL(wasm_trap_handler, false, | 
| "use signal handlers to catch out of bounds memory access in wasm" | 
|  |