diff --git a/agb/src/lib.rs b/agb/src/lib.rs
index 73963fcc..7cbe83d6 100644
--- a/agb/src/lib.rs
+++ b/agb/src/lib.rs
@@ -231,6 +231,10 @@ pub struct Gba {
 impl Gba {
     #[doc(hidden)]
     #[must_use]
+    /// # Safety
+    ///
+    /// May only be called a single time. It is not needed to call this due to
+    /// it being called internally by the [`entry`] macro.
     pub unsafe fn new_in_entry() -> Self {
         Self::single_new()
     }
diff --git a/agb/src/sync/mod.rs b/agb/src/sync/mod.rs
index 17dad495..826a8326 100644
--- a/agb/src/sync/mod.rs
+++ b/agb/src/sync/mod.rs
@@ -33,6 +33,8 @@ pub fn memory_write_hint<T>(val: *mut T) {
 /// This seems to be a problem caused by Rust issue #62256:
 /// <https://github.com/rust-lang/rust/issues/62256>
 ///
+/// # Safety
+///
 /// **WARNING FOR ANYONE WHO FINDS THIS**: This implementation will *only* be
 /// correct on the GBA, and should not be used on any other platform. The GBA
 /// is very old, and has no atomics to begin with - only a main thread and