diff --git a/embassy-stm32/src/rcc/wb.rs b/embassy-stm32/src/rcc/wb.rs
index 91a11a95..4322b950 100644
--- a/embassy-stm32/src/rcc/wb.rs
+++ b/embassy-stm32/src/rcc/wb.rs
@@ -182,32 +182,48 @@ pub struct Config {
     pub apb2_pre: APBPrescaler,
 }
 
+pub const WPAN_DEFAULT: Config = Config {
+    hse: Some(Hse {
+        frequency: mhz(32),
+        prediv: HsePrescaler::NotDivided,
+    }),
+    lse: Some(khz(32)),
+    sys: Sysclk::Pll,
+    mux: Some(PllMux {
+        source: PllSource::Hse,
+        prediv: 2,
+    }),
+    pll48: None,
+
+    pll: Some(Pll {
+        mul: 12,
+        divp: Some(3),
+        divq: Some(4),
+        divr: Some(3),
+    }),
+    pllsai: None,
+
+    ahb1_pre: AHBPrescaler::NotDivided,
+    ahb2_pre: AHBPrescaler::Div2,
+    ahb3_pre: AHBPrescaler::NotDivided,
+    apb1_pre: APBPrescaler::NotDivided,
+    apb2_pre: APBPrescaler::NotDivided,
+};
+
 impl Default for Config {
     #[inline]
     fn default() -> Config {
         Config {
-            hse: Some(Hse {
-                frequency: mhz(32),
-                prediv: HsePrescaler::NotDivided,
-            }),
-            lse: Some(khz(32)),
-            sys: Sysclk::Pll,
-            mux: Some(PllMux {
-                source: PllSource::Hse,
-                prediv: 2,
-            }),
+            hse: None,
+            lse: None,
+            sys: Sysclk::HSI,
+            mux: None,
             pll48: None,
-
-            pll: Some(Pll {
-                mul: 12,
-                divp: Some(3),
-                divq: Some(4),
-                divr: Some(3),
-            }),
+            pll: None,
             pllsai: None,
 
             ahb1_pre: AHBPrescaler::NotDivided,
-            ahb2_pre: AHBPrescaler::Div2,
+            ahb2_pre: AHBPrescaler::NotDivided,
             ahb3_pre: AHBPrescaler::NotDivided,
             apb1_pre: APBPrescaler::NotDivided,
             apb2_pre: APBPrescaler::NotDivided,
diff --git a/tests/stm32/src/bin/wpan_ble.rs b/tests/stm32/src/bin/wpan_ble.rs
index 3ad8aca4..452da77a 100644
--- a/tests/stm32/src/bin/wpan_ble.rs
+++ b/tests/stm32/src/bin/wpan_ble.rs
@@ -12,6 +12,7 @@ use common::*;
 use embassy_executor::Spawner;
 use embassy_stm32::bind_interrupts;
 use embassy_stm32::ipcc::{Config, ReceiveInterruptHandler, TransmitInterruptHandler};
+use embassy_stm32::rcc::WPAN_DEFAULT;
 use embassy_stm32_wpan::hci::host::uart::UartHci;
 use embassy_stm32_wpan::hci::host::{AdvertisingFilterPolicy, EncryptionKey, HostHci, OwnAddressType};
 use embassy_stm32_wpan::hci::types::AdvertisingType;
@@ -40,7 +41,10 @@ async fn run_mm_queue(memory_manager: mm::MemoryManager) {
 
 #[embassy_executor::main]
 async fn main(spawner: Spawner) {
-    let p = embassy_stm32::init(config());
+    let mut config = config();
+    config.rcc = WPAN_DEFAULT;
+
+    let p = embassy_stm32::init(config);
     info!("Hello World!");
 
     let config = Config::default();
diff --git a/tests/stm32/src/bin/wpan_mac.rs b/tests/stm32/src/bin/wpan_mac.rs
index b04a19ee..7eab2fd3 100644
--- a/tests/stm32/src/bin/wpan_mac.rs
+++ b/tests/stm32/src/bin/wpan_mac.rs
@@ -10,6 +10,7 @@ use common::*;
 use embassy_executor::Spawner;
 use embassy_stm32::bind_interrupts;
 use embassy_stm32::ipcc::{Config, ReceiveInterruptHandler, TransmitInterruptHandler};
+use embassy_stm32::rcc::WPAN_DEFAULT;
 use embassy_stm32_wpan::mac::commands::{AssociateRequest, GetRequest, ResetRequest, SetRequest};
 use embassy_stm32_wpan::mac::event::MacEvent;
 use embassy_stm32_wpan::mac::typedefs::{
@@ -31,7 +32,10 @@ async fn run_mm_queue(memory_manager: mm::MemoryManager) {
 
 #[embassy_executor::main]
 async fn main(spawner: Spawner) {
-    let p = embassy_stm32::init(config());
+    let mut config = config();
+    config.rcc = WPAN_DEFAULT;
+
+    let p = embassy_stm32::init(config);
     info!("Hello World!");
 
     let config = Config::default();