diff --git a/src/kernel/idt.cpp b/src/kernel/idt.cpp
index 33843f7..1e1bbbe 100644
--- a/src/kernel/idt.cpp
+++ b/src/kernel/idt.cpp
@@ -352,7 +352,7 @@ void syscall(frame_struct* frame) {
 
     case 18: { // sleep
       Global::currentProc->state = Suspended;
-      Timer::register_event(frame->ebx, &awaken, (void*)Global::currentProc);
+      Timer::register_event(frame->ebx, &awaken, (void*)Global::currentProc, true);
       context_switch(frame);
       break;
     }