diff --git a/embassy-stm32-wpan/src/sub/ble.rs b/embassy-stm32-wpan/src/sub/ble.rs
index cd32692e1..c5f2334f4 100644
--- a/embassy-stm32-wpan/src/sub/ble.rs
+++ b/embassy-stm32-wpan/src/sub/ble.rs
@@ -1,4 +1,3 @@
-use core::marker::PhantomData;
 use core::ptr;
 
 use embassy_stm32::ipcc::Ipcc;
@@ -13,7 +12,7 @@ use crate::unsafe_linked_list::LinkedListNode;
 use crate::{channels, evt};
 
 pub struct Ble {
-    phantom: PhantomData<Ble>,
+    _private: (),
 }
 
 impl Ble {
@@ -29,7 +28,7 @@ impl Ble {
             });
         }
 
-        Self { phantom: PhantomData }
+        Self { _private: () }
     }
     /// `HW_IPCC_BLE_EvtNot`
     pub async fn tl_read(&self) -> EvtBox<Self> {
diff --git a/embassy-stm32-wpan/src/sub/mac.rs b/embassy-stm32-wpan/src/sub/mac.rs
index b0cf0248a..baf4da979 100644
--- a/embassy-stm32-wpan/src/sub/mac.rs
+++ b/embassy-stm32-wpan/src/sub/mac.rs
@@ -1,5 +1,4 @@
 use core::future::poll_fn;
-use core::marker::PhantomData;
 use core::ptr;
 use core::sync::atomic::{AtomicBool, Ordering};
 use core::task::Poll;
@@ -21,12 +20,12 @@ static MAC_WAKER: AtomicWaker = AtomicWaker::new();
 static MAC_EVT_OUT: AtomicBool = AtomicBool::new(false);
 
 pub struct Mac {
-    phantom: PhantomData<Mac>,
+    _private: (),
 }
 
 impl Mac {
     pub(crate) fn new() -> Self {
-        Self { phantom: PhantomData }
+        Self { _private: () }
     }
 
     /// `HW_IPCC_MAC_802_15_4_EvtNot`
diff --git a/embassy-stm32-wpan/src/sub/mm.rs b/embassy-stm32-wpan/src/sub/mm.rs
index da05ad1dd..4e4d2f854 100644
--- a/embassy-stm32-wpan/src/sub/mm.rs
+++ b/embassy-stm32-wpan/src/sub/mm.rs
@@ -1,6 +1,5 @@
 //! Memory manager routines
 use core::future::poll_fn;
-use core::marker::PhantomData;
 use core::mem::MaybeUninit;
 use core::task::Poll;
 
@@ -21,7 +20,7 @@ static MM_WAKER: AtomicWaker = AtomicWaker::new();
 static mut LOCAL_FREE_BUF_QUEUE: Aligned<A4, MaybeUninit<LinkedListNode>> = Aligned(MaybeUninit::uninit());
 
 pub struct MemoryManager {
-    phantom: PhantomData<MemoryManager>,
+    _private: (),
 }
 
 impl MemoryManager {
@@ -44,7 +43,7 @@ impl MemoryManager {
             });
         }
 
-        Self { phantom: PhantomData }
+        Self { _private: () }
     }
 
     pub async fn run_queue(&self) {
diff --git a/embassy-stm32-wpan/src/sub/sys.rs b/embassy-stm32-wpan/src/sub/sys.rs
index c17fd531d..bd2ea3f74 100644
--- a/embassy-stm32-wpan/src/sub/sys.rs
+++ b/embassy-stm32-wpan/src/sub/sys.rs
@@ -1,4 +1,3 @@
-use core::marker::PhantomData;
 use core::ptr;
 
 use crate::cmd::CmdPacket;
@@ -12,7 +11,7 @@ use crate::unsafe_linked_list::LinkedListNode;
 use crate::{channels, Ipcc, SYSTEM_EVT_QUEUE, SYS_CMD_BUF, TL_DEVICE_INFO_TABLE, TL_SYS_TABLE};
 
 pub struct Sys {
-    phantom: PhantomData<Sys>,
+    _private: (),
 }
 
 impl Sys {
@@ -27,7 +26,7 @@ impl Sys {
             });
         }
 
-        Self { phantom: PhantomData }
+        Self { _private: () }
     }
 
     /// Returns CPU2 wireless firmware information (if present).
diff --git a/embassy-stm32/src/rtc/mod.rs b/embassy-stm32/src/rtc/mod.rs
index a588c8b18..07b4fe1f0 100644
--- a/embassy-stm32/src/rtc/mod.rs
+++ b/embassy-stm32/src/rtc/mod.rs
@@ -82,8 +82,9 @@ impl core::ops::Sub for RtcInstant {
     }
 }
 
-#[non_exhaustive]
-pub struct RtcTimeProvider;
+pub struct RtcTimeProvider {
+    _private: (),
+}
 
 impl RtcTimeProvider {
     /// Return the current datetime.
@@ -186,8 +187,8 @@ impl Rtc {
     }
 
     /// Acquire a [`RtcTimeProvider`] instance.
-    pub fn time_provider(&self) -> RtcTimeProvider {
-        RtcTimeProvider
+    pub const fn time_provider(&self) -> RtcTimeProvider {
+        RtcTimeProvider { _private: () }
     }
 
     /// Set the datetime to a new value.
@@ -222,7 +223,7 @@ impl Rtc {
     ///
     /// Will return an `RtcError::InvalidDateTime` if the stored value in the system is not a valid [`DayOfWeek`].
     pub fn now(&self) -> Result<DateTime, RtcError> {
-        RtcTimeProvider.now()
+        self.time_provider().now()
     }
 
     /// Check if daylight savings time is active.