diff --git a/buildman/manager/executor.py b/buildman/manager/executor.py
index b80e87922..1a7c4e114 100644
--- a/buildman/manager/executor.py
+++ b/buildman/manager/executor.py
@@ -147,9 +147,9 @@ class EC2Executor(BuilderExecutor):
   @coroutine
   def stop_builder(self, builder_id):
     ec2_conn = self._get_conn()
-    stopped_instances = yield From(ec2_conn.stop_instances([builder_id], force=True))
-    if builder_id not in [si.id for si in stopped_instances]:
-      raise ExecutorException('Unable to stop instance: %s' % builder_id)
+    terminated_instances = yield From(ec2_conn.terminate_instances([builder_id], force=True))
+    if builder_id not in [si.id for si in terminated_instances]:
+      raise ExecutorException('Unable to terminate instance: %s' % builder_id)
 
 
 class PopenExecutor(BuilderExecutor):