diff --git a/src/lib.rs b/src/lib.rs
index d0c1b55..454759e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -87,7 +87,7 @@ pub mod __priv {
     /// Use type inference to obtain the size of the pointee (without actually using the pointer).
     #[doc(hidden)]
     pub fn size_of_pointee<T>(_ptr: *const T) -> usize {
-        core::mem::size_of::<T>()
+        mem::size_of::<T>()
     }
 }