diff --git a/UserInput.cpp b/UserInput.cpp
index b8be5aa..59f7683 100644
--- a/UserInput.cpp
+++ b/UserInput.cpp
@@ -8,6 +8,10 @@ int UserInput(int pid, unsigned int signal)
   {
     Kernel_signal_mask(pid, SIGNAL_START | SIGNAL_STOP | SIGNAL_TICK);
   }
+  if (signal & SIGNAL_STOP)
+  {
+    return 255;
+  }
   if (signal & SIGNAL_TICK)
   {
     if (Kernel_read_input(KERNEL_INPUT_BUTTON_A))