diff --git a/include/servicepoint.h b/include/servicepoint.h
index 8fb7e84..5863ef5 100644
--- a/include/servicepoint.h
+++ b/include/servicepoint.h
@@ -225,6 +225,9 @@ typedef struct SPBitVec SPBitVec;
  */
 typedef struct TypedCommand TypedCommand;
 
+/**
+ * This is a type only used by cbindgen to have a type for pointers.
+ */
 typedef struct UdpSocket UdpSocket;
 
 /**
diff --git a/src/lib.rs b/src/lib.rs
index a3efb85..47b21d5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -68,4 +68,5 @@ pub(crate) unsafe fn heap_remove<T>(x: NonNull<T>) -> T {
     unsafe { *Box::from_raw(x.as_ptr()) }
 }
 
+/// This is a type only used by cbindgen to have a type for pointers.
 pub struct UdpSocket;
\ No newline at end of file