diff --git a/embassy-stm32/src/rcc/f247.rs b/embassy-stm32/src/rcc/f247.rs
index b855d3c09..79d793dcc 100644
--- a/embassy-stm32/src/rcc/f247.rs
+++ b/embassy-stm32/src/rcc/f247.rs
@@ -414,9 +414,9 @@ fn init_pll(instance: PllInstance, config: Option<Pll>, input: &PllInput) -> Pll
         }),
         #[cfg(any(all(stm32f4, not(stm32f410)), stm32f7))]
         PllInstance::Plli2s => RCC.plli2scfgr().write(|w| {
-            #[cfg(any(stm32f411, stm32f412, stm32f413, stm32f446))]
+            #[cfg(any(stm32f411, stm32f412, stm32f413, stm32f423, stm32f446))]
             w.set_pllm(pll.prediv);
-            #[cfg(any(stm32f412, stm32f413))]
+            #[cfg(any(stm32f412, stm32f413, stm32f423))]
             w.set_pllsrc(input.source);
 
             write_fields!(w);