diff --git a/apps/app_system.c b/apps/app_system.c
index 47f16a8fc5..b13bcedc81 100755
--- a/apps/app_system.c
+++ b/apps/app_system.c
@@ -21,6 +21,7 @@
 #include <unistd.h>
 #include <string.h>
 #include <stdlib.h>
+#include <errno.h>
 
 #include <pthread.h>