diff --git a/index.d.ts b/index.d.ts
index 7ccd295..d4e20da 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,5 +1,5 @@
 /** Post-MVP WebAssembly features to legalize. */
-interface WasmFeatures { // see: https://github.com/WebAssembly/wabt/blob/main/src/feature.def#L25-L35
+interface WasmFeatures { // see: https://github.com/WebAssembly/wabt/blob/main/include/wabt/feature.def#L25
   /** Experimental exception handling. */
   exceptions?: boolean;
   /** Import/export mutable globals. */
@@ -30,6 +30,8 @@ interface WasmFeatures { // see: https://github.com/WebAssembly/wabt/blob/main/s
   gc?: boolean;
   /** 64-bit memory */
   memory64?: boolean;
+  /** Multi-memory. */
+  multi_memory?: boolean;
   /** Extended constant expressions. */
   extended_const?: boolean;
   /** Relaxed SIMD. */