diff --git a/src/mono/wasm/runtime/debug.ts b/src/mono/wasm/runtime/debug.ts
index 0bc38cf21ad9ae..c1f7664adee76b 100644
--- a/src/mono/wasm/runtime/debug.ts
+++ b/src/mono/wasm/runtime/debug.ts
@@ -9,6 +9,8 @@ import { VoidPtr, CharPtr } from "./types/emscripten";
 import { mono_log_warn } from "./logging";
 import { localHeapViewU8 } from "./memory";
 import { utf8ToString } from "./strings";
+import MonoWasmThreads from "consts:monoWasmThreads";
+
 const commands_received: any = new Map<number, CommandResponse>();
 commands_received.remove = function (key: number): CommandResponse { const value = this.get(key); this.delete(key); return value; };
 let _call_function_res_cache: any = {};
@@ -149,6 +151,11 @@ export function mono_wasm_debugger_attached(): void {
     if (runtimeHelpers.waitForDebugger == -1)
         runtimeHelpers.waitForDebugger = 1;
     cwraps.mono_wasm_set_is_debugger_attached(true);
+    if (MonoWasmThreads) {
+        const wasmMemory = Module.getMemory();
+        wasmMemory.grow(wasmMemory.buffer.byteLength >>> 16);
+        runtimeHelpers.updateMemoryViews();
+    }
 }
 
 export function mono_wasm_set_entrypoint_breakpoint(assembly_name: CharPtr, entrypoint_method_token: number): void {