diff --git a/src/function.rs b/src/function.rs
index bc5b20aa..ce224231 100644
--- a/src/function.rs
+++ b/src/function.rs
@@ -167,6 +167,7 @@ pub unsafe fn handle_callback<F, T>(location: &str, f: F) -> *mut ffi::PyObject
     ret
 }
 
+#[cfg(feature="nightly")]
 fn handle_panic(_py: Python, _panic: &any::Any) -> *mut ffi::PyObject {
     let msg = cstr!("Rust panic");
     unsafe {
diff --git a/src/py_class/mod.rs b/src/py_class/mod.rs
index 5e7f5356..0dfb7e37 100644
--- a/src/py_class/mod.rs
+++ b/src/py_class/mod.rs
@@ -64,11 +64,20 @@ pub unsafe fn data_init<'a, T>(_py: Python<'a>, obj: &'a PyObject, offset: usize
 
 #[inline]
 #[doc(hidden)]
+#[cfg(feature="nightly")]
 pub unsafe fn data_drop<'a, T>(_py: Python<'a>, obj: *mut ffi::PyObject, offset: usize) {
     let ptr = (obj as *mut u8).offset(offset as isize) as *mut T;
     ptr::drop_in_place(ptr)
 }
 
+#[inline]
+#[doc(hidden)]
+#[cfg(not(feature="nightly"))]
+pub unsafe fn data_drop<'a, T>(_py: Python<'a>, obj: *mut ffi::PyObject, offset: usize) {
+    let ptr = (obj as *mut u8).offset(offset as isize) as *mut T;
+    ptr::read(ptr);
+}
+
 #[inline]
 #[doc(hidden)]
 pub fn is_ready(_py: Python, ty: &ffi::PyTypeObject) -> bool {