diff --git a/examples/cancel-reschedule.rs b/examples/cancel-reschedule.rs
index e0bdaae80e..a38a9c4eae 100644
--- a/examples/cancel-reschedule.rs
+++ b/examples/cancel-reschedule.rs
@@ -25,7 +25,7 @@ mod app {
     fn init(cx: init::Context) -> (Shared, Local, init::Monotonics) {
         let systick = cx.core.SYST;
 
-        // Initialize the monotonic
+        // Initialize the monotonic (SysTick rate in QEMU is 12 MHz)
         let mono = Systick::new(systick, 12_000_000);
 
         hprintln!("init").ok();
diff --git a/examples/common.rs b/examples/common.rs
index 26a5c8fb33..1fe671e61a 100644
--- a/examples/common.rs
+++ b/examples/common.rs
@@ -33,6 +33,8 @@ mod app {
     #[init]
     fn init(cx: init::Context) -> (Shared, Local, init::Monotonics) {
         let systick = cx.core.SYST;
+
+        // Initialize the monotonic (SysTick rate in QEMU is 12 MHz)
         let mono = Systick::new(systick, 12_000_000);
 
         // Spawn the task `foo` directly after `init` finishes
diff --git a/examples/periodic.rs b/examples/periodic.rs
index 495054ea42..40c69257e7 100644
--- a/examples/periodic.rs
+++ b/examples/periodic.rs
@@ -25,6 +25,7 @@ mod app {
     fn init(cx: init::Context) -> (Shared, Local, init::Monotonics) {
         let systick = cx.core.SYST;
 
+        // Initialize the monotonic (SysTick rate in QEMU is 12 MHz)
         let mono = Systick::new(systick, 12_000_000);
 
         foo::spawn_after(1.secs()).unwrap();
diff --git a/examples/schedule.rs b/examples/schedule.rs
index 446a382892..5bad5a30ad 100644
--- a/examples/schedule.rs
+++ b/examples/schedule.rs
@@ -25,7 +25,7 @@ mod app {
     fn init(cx: init::Context) -> (Shared, Local, init::Monotonics) {
         let systick = cx.core.SYST;
 
-        // Initialize the monotonic
+        // Initialize the monotonic (SysTick rate in QEMU is 12 MHz)
         let mono = Systick::new(systick, 12_000_000);
 
         hprintln!("init").ok();
diff --git a/examples/t-schedule.rs b/examples/t-schedule.rs
index 6ee08afbe9..5ec420873d 100644
--- a/examples/t-schedule.rs
+++ b/examples/t-schedule.rs
@@ -25,6 +25,7 @@ mod app {
     fn init(cx: init::Context) -> (Shared, Local, init::Monotonics) {
         let systick = cx.core.SYST;
 
+        // Initialize the monotonic (SysTick rate in QEMU is 12 MHz)
         let mono = Systick::new(systick, 12_000_000);
 
         debug::exit(debug::EXIT_SUCCESS); // Exit QEMU simulator