diff --git a/src/main/ts/spawn.ts b/src/main/ts/spawn.ts
index 1188101..3fabaaa 100644
--- a/src/main/ts/spawn.ts
+++ b/src/main/ts/spawn.ts
@@ -49,6 +49,7 @@ export interface TSpawnCtxNormalized {
   ee:         EventEmitter
   on:         Partial<TSpawnListeners>
   ac:         AbortController
+  signal:     AbortController['signal']
   shell:      string | true | undefined
   spawn:      typeof cp.spawn
   spawnSync:  typeof cp.spawnSync
@@ -73,6 +74,7 @@ export const normalizeCtx = (...ctxs: TSpawnCtx[]): TSpawnCtxNormalized => assig
   env:        process.env,
   ee:         new EventEmitter(),
   ac:         new AbortController(),
+  get signal() { return this.ac.signal },
   on:         {},
   detached:   process.platform !== 'win32',
   shell:      true,
@@ -105,7 +107,7 @@ export class VoidWritable extends Transform {
   }
 }
 
-export const buildSpawnOpts = ({spawnOpts, stdio, cwd, shell, input, env, detached, ac: {signal}}: TSpawnCtxNormalized) => ({
+export const buildSpawnOpts = ({spawnOpts, stdio, cwd, shell, input, env, detached, signal}: TSpawnCtxNormalized) => ({
   ...spawnOpts,
   env,
   cwd,
diff --git a/src/test/ts/spawn.test.ts b/src/test/ts/spawn.test.ts
index 51f2772..f4679fc 100644
--- a/src/test/ts/spawn.test.ts
+++ b/src/test/ts/spawn.test.ts
@@ -51,9 +51,11 @@ describe('invoke()', () => {
 
 describe('normalizeCtx()', () => {
   it('normalizes ctx', () => {
+    const signal = new AbortController().signal
     const cwds = ['a', 'b', 'c']
     const ctx = {
       cmd: 'foo',
+      signal,
       get cwd () {
         return cwds.shift() || process.cwd()
       },
@@ -62,6 +64,7 @@ describe('normalizeCtx()', () => {
     assert.equal(normalized.cwd, 'a')
     assert.equal(normalized.cwd, 'b')
     assert.equal(normalized.cwd, 'c')
+    assert.equal(normalized.signal, signal)
     assert.ok(normalized.ee instanceof EventEmitter)
     assert.ok(normalized.ac instanceof AbortController)
   })