diff --git a/src/arch/x86_64/interrupts.rs b/src/arch/x86_64/interrupts.rs
index 5e68ac8..dae7506 100644
--- a/src/arch/x86_64/interrupts.rs
+++ b/src/arch/x86_64/interrupts.rs
@@ -169,10 +169,11 @@ extern "x86-interrupt" fn task_sched(_: InterruptStackFrame) {
         }
     }
 
-    // ensure that the next CPU core runs the next process when it receives this interrupt
-    if PTABLE_IDX.load(Ordering::SeqCst) < (PTABLE.read().len() - 1) {
+    if PTABLE_IDX.load(Ordering::SeqCst) < (PTABLE.read().len()) {
+        // ensure that the next CPU core runs the next process when it receives this interrupt
         PTABLE_IDX.fetch_add(1, Ordering::SeqCst);
     } else {
+        // we've reached the end of PTABLE, so time to reset this
         PTABLE_IDX.store(0, Ordering::SeqCst);
     }