diff --git a/embassy-stm32/src/dma/bdma.rs b/embassy-stm32/src/dma/bdma.rs
index bc51cdc4..6160b9f4 100644
--- a/embassy-stm32/src/dma/bdma.rs
+++ b/embassy-stm32/src/dma/bdma.rs
@@ -78,7 +78,7 @@ foreach_dma_channel! {
                 );
             }
 
-            unsafe fn start_write_repeated<W: Word>(&mut self, _request: Request, repeated: *const [W], count: usize, reg_addr: *mut W, options: TransferOptions) {
+            unsafe fn start_write_repeated<W: Word>(&mut self, _request: Request, repeated: *const W, count: usize, reg_addr: *mut W, options: TransferOptions) {
                 low_level_api::start_transfer(
                     pac::$dma_peri,
                     $channel_num,
diff --git a/embassy-stm32/src/dma/dma.rs b/embassy-stm32/src/dma/dma.rs
index 25050585..fec60f70 100644
--- a/embassy-stm32/src/dma/dma.rs
+++ b/embassy-stm32/src/dma/dma.rs
@@ -102,7 +102,7 @@ foreach_dma_channel! {
                 )
             }
 
-            unsafe fn start_write_repeated<W: Word>(&mut self, request: Request, repeated: *const [W], count: usize, reg_addr: *mut W, options: TransferOptions) {
+            unsafe fn start_write_repeated<W: Word>(&mut self, request: Request, repeated: *const W, count: usize, reg_addr: *mut W, options: TransferOptions) {
                 low_level_api::start_transfer(
                     pac::$dma_peri,
                     $channel_num,
diff --git a/embassy-stm32/src/dma/gpdma.rs b/embassy-stm32/src/dma/gpdma.rs
index 87c0dfdf..d252cef3 100644
--- a/embassy-stm32/src/dma/gpdma.rs
+++ b/embassy-stm32/src/dma/gpdma.rs
@@ -75,7 +75,7 @@ foreach_dma_channel! {
                 )
             }
 
-            unsafe fn start_write_repeated<W: Word>(&mut self, request: Request, repeated: *const [W], count: usize, reg_addr: *mut W, options: TransferOptions) {
+            unsafe fn start_write_repeated<W: Word>(&mut self, request: Request, repeated: *const W, count: usize, reg_addr: *mut W, options: TransferOptions) {
                 low_level_api::start_transfer(
                     pac::$dma_peri,
                     $channel_num,
diff --git a/embassy-stm32/src/dma/mod.rs b/embassy-stm32/src/dma/mod.rs
index 706bcff3..b51e0d40 100644
--- a/embassy-stm32/src/dma/mod.rs
+++ b/embassy-stm32/src/dma/mod.rs
@@ -59,7 +59,7 @@ pub(crate) mod sealed {
         unsafe fn start_write_repeated<W: super::Word>(
             &mut self,
             request: Request,
-            repeated: *const [W],
+            repeated: *const W,
             count: usize,
             reg_addr: *mut W,
             options: TransferOptions,
@@ -246,7 +246,7 @@ mod transfers {
     pub fn write_repeated<'a, W: Word>(
         channel: impl Peripheral<P = impl Channel> + 'a,
         request: Request,
-        repeated: *const [W],
+        repeated: *const W,
         count: usize,
         reg_addr: *mut W,
     ) -> impl Future<Output = ()> + 'a {
diff --git a/embassy-stm32/src/spi/mod.rs b/embassy-stm32/src/spi/mod.rs
index 439d92b9..5b81c791 100644
--- a/embassy-stm32/src/spi/mod.rs
+++ b/embassy-stm32/src/spi/mod.rs
@@ -466,7 +466,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
 
         let tx_request = self.txdma.request();
         let tx_dst = T::REGS.tx_ptr();
-        let clock_byte = [0x00u8];
+        let clock_byte = 0x00u8;
         let tx_f = crate::dma::write_repeated(&mut self.txdma, tx_request, &clock_byte, clock_byte_count, tx_dst);
 
         unsafe {