diff --git a/Kernel/Thread.cpp b/Kernel/Thread.cpp
index 53b6f49b63..d229e46f74 100644
--- a/Kernel/Thread.cpp
+++ b/Kernel/Thread.cpp
@@ -163,6 +163,7 @@ Thread::~Thread()
 
 void Thread::unblock()
 {
+    m_blocker = nullptr;
     if (current == this) {
         if (m_should_die)
             set_state(Thread::Dying);