diff --git a/examples/rtic_bare6.rs b/examples/rtic_bare6.rs
index df5f9deb53f89109ea89e205e599e836886342b5..8527c984706dff4fc4be71c6d0cff36c211fdc5e 100644
--- a/examples/rtic_bare6.rs
+++ b/examples/rtic_bare6.rs
@@ -55,21 +55,21 @@ const APP: () = {
 
         let rcc = device.RCC.constrain();
 
-        let _clocks = rcc.cfgr.freeze();
+        //let _clocks = rcc.cfgr.freeze();
 
-        // Set up the system clock. 48 MHz?
+        //Set up the system clock. 48 MHz?
         // let _clocks = rcc
         //     .cfgr
         //     .sysclk(48.mhz())
         //     .pclk1(24.mhz())
         //     .freeze();
 
-        // let _clocks = rcc
-        //     .cfgr
-        //     .sysclk(64.mhz())
-        //     .pclk1(64.mhz())
-        //     .pclk2(64.mhz())
-        //     .freeze();
+        let _clocks = rcc
+            .cfgr
+            .sysclk(64.mhz())
+            .pclk1(64.mhz())
+            .pclk2(64.mhz())
+            .freeze();
         //
         // let _clocks = rcc
         //     .cfgr
@@ -208,6 +208,7 @@ fn clock_out(rcc: &RCC, gpioc: &GPIOC) {
 //    `rcc.cfgr.sysclk(84.mhz()).pclk1(42.mhz()).pclk2(64.mhz()).freeze();`
 //
 //    ** your answer here **
+//    It works?
 //
 //    Start `stm32cubemx` and select or create a project targeting stm32f401.
 //    Go to the graphical clock configuration view.
@@ -219,6 +220,8 @@ fn clock_out(rcc: &RCC, gpioc: &GPIOC) {
 //    What happens?
 //
 //    ** your answer here **
+//    panicked at 'assertion failed: pclk1 <= pclk1_max', /home/carlosterberg/.cargo/registry/src/github.com-1ecc6299db9ec823/stm32f4xx-hal-0.8.3/src/rcc.rs:321:9
+//    In other words it crashes.
 //
 //    Try to setup the clock according to:
 //
@@ -227,6 +230,7 @@ fn clock_out(rcc: &RCC, gpioc: &GPIOC) {
 //    `rcc.cfgr.sysclk(84.mhz()).pclk1(42.mhz()).pclk2(64.mhz()).freeze();`
 //
 //    ** your answer here **
+//    It works, very fast blinking
 //
 //    Commit your answers (bare6_0)
 //
diff --git a/examples/rtic_bare8.rs b/examples/rtic_bare8.rs
index b4b18ee4a72d728359e36c70467f4de9ba8643a0..241530d1a1ed614fd0b22617ea7831326e9d3580 100644
--- a/examples/rtic_bare8.rs
+++ b/examples/rtic_bare8.rs
@@ -11,7 +11,7 @@
 
 use panic_rtt_target as _;
 
-use nb::block;
+use stm32f4xx_hal::nb::block;
 
 use stm32f4xx_hal::{
     gpio::{gpioa::PA, Output, PushPull},