diff --git a/embassy-stm32/src/rcc/f013.rs b/embassy-stm32/src/rcc/f013.rs
index cfa223d1f..1155b6acd 100644
--- a/embassy-stm32/src/rcc/f013.rs
+++ b/embassy-stm32/src/rcc/f013.rs
@@ -126,13 +126,13 @@ pub struct Config {
     pub ls: super::LsConfig,
 }
 
-impl Default for Config {
-    fn default() -> Self {
+impl Config {
+    pub const fn new() -> Self {
         Self {
             hsi: true,
             hse: None,
             #[cfg(crs)]
-            hsi48: Some(Default::default()),
+            hsi48: Some(crate::rcc::Hsi48Config::new()),
             sys: Sysclk::HSI,
             pll: None,
 
@@ -147,7 +147,7 @@ impl Default for Config {
             apb1_pre: APBPrescaler::DIV1,
             #[cfg(not(stm32f0))]
             apb2_pre: APBPrescaler::DIV1,
-            ls: Default::default(),
+            ls: crate::rcc::LsConfig::new(),
 
             #[cfg(stm32f1)]
             // ensure ADC is not out of range by default even if APB2 is maxxed out (36mhz)
@@ -163,11 +163,17 @@ impl Default for Config {
             #[cfg(stm32f107)]
             i2s3_src: I2s2src::SYS,
 
-            mux: Default::default(),
+            mux: super::mux::ClockMux::default(),
         }
     }
 }
 
+impl Default for Config {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 /// Initialize and Set the clock frequencies
 pub(crate) unsafe fn init(config: Config) {
     // Turn on the HSI