3 files changed, 3 insertions, 3 deletions

diff --git a/stm32-metapac-gen/src/assets/metadata.rs b/stm32-metapac-gen/src/assets/metadata.rs
index 7fe49ceba..150aa5956 100644
--- a/stm32-metapac-gen/src/assets/metadata.rs
+++ b/stm32-metapac-gen/src/assets/metadata.rs
@@ -76,7 +76,7 @@ pub struct PeripheralRccRegister {
 pub struct PeripheralPin {
     pub pin: &'static str,
     pub signal: &'static str,
-    pub af: Option<&'static str>,
+    pub af: Option<u8>,
 }
 
 #[derive(Debug, Eq, PartialEq, Clone)]
diff --git a/stm32-metapac-gen/src/data.rs b/stm32-metapac-gen/src/data.rs
index 9bb4e191d..24f0bcf0d 100644
--- a/stm32-metapac-gen/src/data.rs
+++ b/stm32-metapac-gen/src/data.rs
@@ -87,7 +87,7 @@ pub struct PeripheralRccRegister {
 pub struct PeripheralPin {
     pub pin: String,
     pub signal: String,
-    pub af: Option<String>,
+    pub af: Option<u8>,
 }
 
 #[derive(Debug, Eq, PartialEq, Clone, Deserialize)]
diff --git a/stm32-metapac-gen/src/lib.rs b/stm32-metapac-gen/src/lib.rs
index d167da49c..fc262f9c4 100644
--- a/stm32-metapac-gen/src/lib.rs
+++ b/stm32-metapac-gen/src/lib.rs
@@ -182,7 +182,7 @@ pub fn gen_chip(
                 row.push(pin.pin.clone());
                 row.push(pin.signal.clone());
                 if let Some(ref af) = pin.af {
-                    row.push(af.clone());
+                    row.push(format!("{}", af));
                 }
                 peripheral_pins_table.push(row);
             }