diff --git a/main.c b/main.c
index 1336d06..fecd39d 100644
--- a/main.c
+++ b/main.c
@@ -11,8 +11,10 @@
 #include <unistd.h>
 #include <signal.h>
 
+static
 pid_t pid_child;
 
+static
 void drop_root(void)
 {
   /// Drop root privileges
@@ -31,7 +33,7 @@ void drop_root(void)
     errx(1, "Sanity check failed. Able to regain root");
 }
 
-struct sigaction forward_signal_descriptor;
+static
 void forward_signal(int sig)
 {
   if (kill(pid_child, sig) == -1)
@@ -43,6 +45,7 @@ void forward_signal(int sig)
 
 int main(int argc, char* const* argv)
 {
+  struct sigaction forward_signal_descriptor;
   forward_signal_descriptor.sa_flags = SA_RESTART;
   forward_signal_descriptor.sa_handler = &forward_signal;