diff --git a/src/agents/sandbox/docker.ts b/src/agents/sandbox/docker.ts
index ce7477531b5..a84875f311b 100644
--- a/src/agents/sandbox/docker.ts
+++ b/src/agents/sandbox/docker.ts
@@ -91,7 +91,7 @@ export function execDockerRaw(
       if (signal.aborted) {
         handleAbort();
       } else {
-        signal.addEventListener("abort", handleAbort);
+        signal.addEventListener("abort", handleAbort, { once: true });
       }
     }