diff --git a/embassy-stm32/src/rcc/c0.rs b/embassy-stm32/src/rcc/c0.rs
index 0b749bcff..68f67af01 100644
--- a/embassy-stm32/src/rcc/c0.rs
+++ b/embassy-stm32/src/rcc/c0.rs
@@ -59,9 +59,9 @@ pub struct Config {
     pub mux: super::mux::ClockMux,
 }
 
-impl Default for Config {
+impl Config {
     #[inline]
-    fn default() -> Config {
+    pub const fn new() -> Self {
         Config {
             hsi: Some(Hsi {
                 sys_div: HsiSysDiv::DIV4,
@@ -71,12 +71,19 @@ impl Default for Config {
             sys: Sysclk::HSISYS,
             ahb_pre: AHBPrescaler::DIV1,
             apb1_pre: APBPrescaler::DIV1,
-            ls: Default::default(),
-            mux: Default::default(),
+            ls: crate::rcc::LsConfig::new(),
+            mux: super::mux::ClockMux::default(),
         }
     }
 }
 
+impl Default for Config {
+    #[inline]
+    fn default() -> Config {
+        Self::new()
+    }
+}
+
 pub(crate) unsafe fn init(config: Config) {
     // Turn on the HSI
     match config.hsi {