diff --git a/include/ctl-server.h b/include/ctl-server.h
index bfb7783..d0fc141 100644
--- a/include/ctl-server.h
+++ b/include/ctl-server.h
@@ -33,6 +33,7 @@ struct ctl_server_output {
 	unsigned height;
 	unsigned width;
 	bool captured;
+	char power[8];
 };
 
 struct ctl_server_actions {
diff --git a/src/ctl-server.c b/src/ctl-server.c
index 6e38b90..6661d54 100644
--- a/src/ctl-server.c
+++ b/src/ctl-server.c
@@ -380,12 +380,13 @@ static struct cmd_response* generate_output_list(struct ctl* self)
 	response->data = json_array();
 	for (size_t i = 0; i < num_outputs; ++i)
 		json_array_append_new(response->data, json_pack(
-					"{s:s, s:s, s:i, s:i, s:b}",
+					"{s:s, s:s, s:i, s:i, s:b, s:s}",
 				"name", outputs[i].name,
 				"description", outputs[i].description,
 				"height", outputs[i].height,
 				"width", outputs[i].width,
-				"captured", outputs[i].captured));
+				"captured", outputs[i].captured,
+				"power", outputs[i].power));
 	free(outputs);
 	return response;
 }
diff --git a/src/main.c b/src/main.c
index 45b45dd..ca8b457 100644
--- a/src/main.c
+++ b/src/main.c
@@ -537,6 +537,8 @@ static int get_output_list(struct ctl* ctl,
 		item->height = output->height;
 		item->width = output->width;
 		item->captured = (output->id == self->selected_output->id);
+		strlcpy(item->power, output_power_state_name(output->power),
+				sizeof(item->power));
 		item++;
 	}
 	return n;