diff --git a/src/core/modules/impl/handler/AbstractContractHandler.ts b/src/core/modules/impl/handler/AbstractContractHandler.ts
index d32c11ff..38650fc6 100644
--- a/src/core/modules/impl/handler/AbstractContractHandler.ts
+++ b/src/core/modules/impl/handler/AbstractContractHandler.ts
@@ -26,7 +26,7 @@ export abstract class AbstractContractHandler<State> implements HandlerApi<State
     interactionData: InteractionData<Input>
   ): Promise<InteractionResult<State, Result>>;
 
-  abstract initState(state: State): void;
+  abstract initState(state: State);
 
   abstract maybeCallStateConstructor(
     initialState: State,
diff --git a/src/core/modules/impl/handler/JsHandlerApi.ts b/src/core/modules/impl/handler/JsHandlerApi.ts
index 9da28a58..167c1e01 100644
--- a/src/core/modules/impl/handler/JsHandlerApi.ts
+++ b/src/core/modules/impl/handler/JsHandlerApi.ts
@@ -45,7 +45,8 @@ export class JsHandlerApi<State> extends AbstractContractHandler<State> {
   }
 
   // eslint-disable-next-line
-  initState(state: State): void {}
+  initState(state: State) {
+  }
 
   async maybeCallStateConstructor<Input>(
     initialState: State,
diff --git a/src/core/modules/impl/handler/WasmHandlerApi.ts b/src/core/modules/impl/handler/WasmHandlerApi.ts
index b1a8d994..9c1b6fc4 100644
--- a/src/core/modules/impl/handler/WasmHandlerApi.ts
+++ b/src/core/modules/impl/handler/WasmHandlerApi.ts
@@ -66,11 +66,15 @@ export class WasmHandlerApi<State> extends AbstractContractHandler<State> {
     }
   }
 
-  initState(state: State): void {
+  initState(state: State) {
     switch (this.contractDefinition.srcWasmLang) {
       case 'rust': {
-        this.wasmExports.initState(state);
-        break;
+        const ret = this.wasmExports.initState(state);
+        if (ret) {
+          throw new Error(ret);
+        } else {
+          return;
+        }
       }
       default: {
         throw new Error(`Support for ${this.contractDefinition.srcWasmLang} not implemented yet.`);
diff --git a/src/core/modules/impl/wasm/rust-wasm-imports.ts b/src/core/modules/impl/wasm/rust-wasm-imports.ts
index ccb62c12..17e5b86a 100644
--- a/src/core/modules/impl/wasm/rust-wasm-imports.ts
+++ b/src/core/modules/impl/wasm/rust-wasm-imports.ts
@@ -369,11 +369,22 @@ export const rustWasmImports = (swGlobal, wbindgenImports, wasmInstance, dtorVal
   }
   /**
    * @param {any} state
+   * @returns {boolean}
    */
   function initState(state) {
     try {
-      wasmInstance.exports.initState(addBorrowedObject(state));
+      const retptr = wasmInstance.exports.__wbindgen_add_to_stack_pointer(-16);
+      wasmInstance.exports.initState(retptr, addBorrowedObject(state));
+      var r0 = getInt32Memory0()[retptr / 4 + 0];
+      var r1 = getInt32Memory0()[retptr / 4 + 1];
+      let v0;
+      if (r0 !== 0) {
+        v0 = getStringFromWasm0(r0, r1).slice();
+        wasmInstance.exports.__wbindgen_free(r0, r1 * 1);
+      }
+      return v0;
     } finally {
+      wasmInstance.exports.__wbindgen_add_to_stack_pointer(16);
       heap[stack_pointer++] = undefined;
     }
   };
@@ -770,6 +781,7 @@ export const rustWasmImports = (swGlobal, wbindgenImports, wasmInstance, dtorVal
       const ret = arg0;
       return addHeapObject(ret);
     },
+
     __wbindgen_jsval_loose_eq: function (arg0, arg1) {
       const ret = getObject(arg0) == getObject(arg1);
       _assertBoolean(ret);