diff --git a/src/util.rs b/src/util.rs
index 03d401f94..f707ee9d1 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -26,10 +26,8 @@ pub(crate) fn check_null_bytes(data: &[u8]) -> Result<bool, Error> {
 }
 
 /// This function copies the slice into a vec and appends an element to its end.
-/// The vec is allocated with reserve_exact.
 pub(crate) fn copy_and_push<T: Copy>(data: &[T], to_push: T) -> alloc::vec::Vec<T> {
-    let mut copy = alloc::vec::Vec::new();
-    copy.reserve_exact(data.len() + 1);
+    let mut copy = alloc::vec::Vec::with_capacity(data.len() + 1);
     copy.extend_from_slice(data);
     copy.push(to_push);
     copy