diff --git a/library/core/src/fmt/mod.rs b/library/core/src/fmt/mod.rs
index 7ca390941bc..580f95eddce 100644
--- a/library/core/src/fmt/mod.rs
+++ b/library/core/src/fmt/mod.rs
@@ -7,7 +7,7 @@ use crate::char::{EscapeDebugExtArgs, MAX_LEN_UTF8};
 use crate::marker::PhantomData;
 use crate::num::fmt as numfmt;
 use crate::ops::Deref;
-use crate::{iter, mem, result, str};
+use crate::{iter, result, str};
 
 mod builders;
 #[cfg(not(no_fp_fmt_parse))]
diff --git a/library/core/src/fmt/rt.rs b/library/core/src/fmt/rt.rs
index c36feff0b62..b9cae8645cd 100644
--- a/library/core/src/fmt/rt.rs
+++ b/library/core/src/fmt/rt.rs
@@ -76,7 +76,7 @@ macro_rules! argument_new {
                 formatter: {
                     let f: fn(&$t, &mut Formatter<'_>) -> Result = $f;
                     // SAFETY: This is only called with `value`, which has the right type.
-                    unsafe { mem::transmute(f) }
+                    unsafe { core::mem::transmute(f) }
                 },
                 #[cfg(any(sanitize = "cfi", sanitize = "kcfi"))]
                 formatter: |ptr: NonNull<()>, fmt: &mut Formatter<'_>| {