diff --git a/src/runtime/src/kernel.rs b/src/runtime/src/kernel.rs
index 4cd8dce5..a1568268 100644
--- a/src/runtime/src/kernel.rs
+++ b/src/runtime/src/kernel.rs
@@ -100,7 +100,7 @@ extern fn exception_unimplemented() {
 macro_rules! api {
     ($i:ident) => ({
         extern { static $i: u8; }
-        api!($i = &$i as *const _)
+        unsafe { api!($i = &$i as *const _) }
     });
     ($i:ident, $d:item) => ({
         $d
@@ -130,6 +130,8 @@ fn resolve(required: &[u8]) -> Option<u32> {
         api!(rtio_input_data = rtio::input_data),
         api!(rtio_input_timestamped_data = rtio::input_timestamped_data),
 
+        api!(__aeabi_l2d),
+
         api!(_Unwind_Resume = exception_unimplemented),
         api!(__artiq_personality = exception_unimplemented),
         api!(__artiq_raise = exception_unimplemented),