diff --git a/infrastructure/container_payload/preloader.c b/infrastructure/container_payload/preloader.c
index f35bd5c..bb4134f 100644
--- a/infrastructure/container_payload/preloader.c
+++ b/infrastructure/container_payload/preloader.c
@@ -3,18 +3,22 @@
 #include <unistd.h>
 
 pid_t fork(void) {
-  fprintf(stdout, "fork not allowed\n");  
-  
+  printf("fork not allowed\n");
    _exit(1);
 }
 
 pid_t vfork(void) {
-   fprintf(stdout, "vfork not allowed\n");  
+   printf("vfork not allowed\n");
+   _exit(1);
+}
+
+int system(char* text) {
+  printf("system not allowed\n");
    _exit(1);
 }
 
 int execve(const char *filename, char *const argv[],
 	   char *const envp[]) {
-  fprintf(stdout, "execve not allowed\n");
+  printf("execve not allowed\n");
   _exit(1);
 }