diff --git a/trunk/src/app/srs_app_ng_exec.cpp b/trunk/src/app/srs_app_ng_exec.cpp
index 85750dec0c..44e2e1d04e 100644
--- a/trunk/src/app/srs_app_ng_exec.cpp
+++ b/trunk/src/app/srs_app_ng_exec.cpp
@@ -23,6 +23,7 @@
 
 #include <srs_app_ng_exec.hpp>
 
+#include <stdlib.h>
 using namespace std;
 
 #include <srs_kernel_error.hpp>