diff --git a/src/spark_driver/camera/realsense-ros/realsense2_camera/src/base_realsense_node.cpp b/src/spark_driver/camera/realsense-ros/realsense2_camera/src/base_realsense_node.cpp
index 84b8eb0..068baab 100755
--- a/src/spark_driver/camera/realsense-ros/realsense2_camera/src/base_realsense_node.cpp
+++ b/src/spark_driver/camera/realsense-ros/realsense2_camera/src/base_realsense_node.cpp
@@ -4,7 +4,7 @@
 #include <algorithm>
 #include <cctype>
 #include <mutex>
-
+using namespace std;
 using namespace realsense2_camera;
 using namespace ddynamic_reconfigure;