diff --git a/agents/src/llm/fallback_adapter.ts b/agents/src/llm/fallback_adapter.ts
index 128c2392c..2c4c04da3 100644
--- a/agents/src/llm/fallback_adapter.ts
+++ b/agents/src/llm/fallback_adapter.ts
@@ -241,7 +241,7 @@ class FallbackLLMStream extends LLMStream {
       }
 
       // Handle timeout errors
-      if (error instanceof Error && error.name === 'AbortError') {
+      if ((error as { name?: string })?.name === 'AbortError') {
         if (checkRecovery) {
           this._log.warn({ llm: llm.label() }, 'recovery timed out');
         } else {
diff --git a/agents/src/voice/agent_activity.ts b/agents/src/voice/agent_activity.ts
index 21a6a9fac..3279af680 100644
--- a/agents/src/voice/agent_activity.ts
+++ b/agents/src/voice/agent_activity.ts
@@ -1608,7 +1608,7 @@ export class AgentActivity implements RecognitionHooks {
     const onAbort = () => waitInactiveTask.cancel();
     signal.addEventListener('abort', onAbort, { once: true });
     const waitInactiveResult = waitInactiveTask.result.catch((error) => {
-      if (error instanceof Error && error.name === 'AbortError') {
+      if ((error as { name?: string })?.name === 'AbortError') {
         return;
       }
       throw error;
diff --git a/agents/src/voice/audio_recognition.ts b/agents/src/voice/audio_recognition.ts
index dfa72de1d..26d9865c7 100644
--- a/agents/src/voice/audio_recognition.ts
+++ b/agents/src/voice/audio_recognition.ts
@@ -1729,8 +1729,8 @@ export class AudioRecognition {
         this.logger.debug('EOU detection task completed');
       })
       .catch((err: unknown) => {
-        if (err instanceof Error && err.name === 'AbortError') {
-          // ignore aborted errors
+        if ((err as { name?: string })?.name === 'AbortError') {
+          // ignore aborted errors (DOMException from AbortSignal is not instanceof Error)
           return;
         }
         this.logger.error(err, 'Error in EOU detection task:');
@@ -1745,7 +1745,7 @@ export class AudioRecognition {
     try {
       await this.bounceEOUTask.result;
     } catch (error) {
-      if (error instanceof Error && error.name === 'AbortError') {
+      if ((error as { name?: string })?.name === 'AbortError') {
         return;
       }
       throw error;
@@ -2264,7 +2264,7 @@ export class AudioRecognition {
         this.logger.debug('User turn committed');
       })
       .catch((err: unknown) => {
-        if (err instanceof Error && err.name === 'AbortError') {
+        if ((err as { name?: string })?.name === 'AbortError') {
           this.logger.debug('User turn commit task cancelled');
           return;
         }
diff --git a/plugins/elevenlabs/src/stt.ts b/plugins/elevenlabs/src/stt.ts
index 40c7f88fe..5eecbb6cf 100644
--- a/plugins/elevenlabs/src/stt.ts
+++ b/plugins/elevenlabs/src/stt.ts
@@ -393,7 +393,7 @@ export class STT extends stt.STT {
       if (error instanceof APIStatusError) {
         throw new APIConnectionError({ message: error.message });
       }
-      if (error instanceof Error && error.name === 'AbortError') {
+      if ((error as { name?: string })?.name === 'AbortError') {
         throw new APITimeoutError({});
       }
       throw new APIConnectionError({});
diff --git a/plugins/google/src/beta/gemini_tts.ts b/plugins/google/src/beta/gemini_tts.ts
index 0d778f0c0..edd331552 100644
--- a/plugins/google/src/beta/gemini_tts.ts
+++ b/plugins/google/src/beta/gemini_tts.ts
@@ -267,7 +267,7 @@ export class ChunkedStream extends tts.ChunkedStream {
 
       sendLastFrame(true);
     } catch (error: unknown) {
-      if (error instanceof Error && error.name === 'AbortError') {
+      if ((error as { name?: string })?.name === 'AbortError') {
         return;
       }
       if (isAPIError(error)) throw error;
diff --git a/plugins/openai/src/tts.ts b/plugins/openai/src/tts.ts
index f0261e89d..d72a23c66 100644
--- a/plugins/openai/src/tts.ts
+++ b/plugins/openai/src/tts.ts
@@ -147,7 +147,7 @@ export class ChunkedStream extends tts.ChunkedStream {
 
       this.queue.close();
     } catch (error) {
-      if (error instanceof Error && error.name === 'AbortError') {
+      if ((error as { name?: string })?.name === 'AbortError') {
         return;
       }
       throw error;