diff --git a/trunk/src/app/srs_app_http_api.cpp b/trunk/src/app/srs_app_http_api.cpp
index bbbdeb2ccd..b6e5f50532 100755
--- a/trunk/src/app/srs_app_http_api.cpp
+++ b/trunk/src/app/srs_app_http_api.cpp
@@ -27,6 +27,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <sstream>
 #include <stdlib.h>
+#include <signal.h>
 using namespace std;
 
 #include <srs_kernel_log.hpp>