diff --git a/src/system/kernel/arch/x86/arch_int.cpp b/src/system/kernel/arch/x86/arch_int.cpp
index 5588d5d181..b8213c6fcc 100644
--- a/src/system/kernel/arch/x86/arch_int.cpp
+++ b/src/system/kernel/arch/x86/arch_int.cpp
@@ -233,7 +233,9 @@ x86_hardware_interrupt(struct iframe* frame)
 			apic_end_of_interrupt();
 	}
 
+	thread->pinned_to_cpu++;
 	int_io_interrupt_handler(vector, levelTriggered);
+	thread->pinned_to_cpu--;
 
 	if (levelTriggered) {
 		if (!sCurrentPIC->end_of_interrupt(vector))