diff --git a/clippy_lints/src/significant_drop_tightening.rs b/clippy_lints/src/significant_drop_tightening.rs
index 3febf747967..cc2dbae4bc4 100644
--- a/clippy_lints/src/significant_drop_tightening.rs
+++ b/clippy_lints/src/significant_drop_tightening.rs
@@ -1,6 +1,6 @@
 use clippy_utils::{
     diagnostics::span_lint_and_then,
-    expr_or_init, get_attr, match_def_path, path_to_local, paths,
+    expr_or_init, get_attr, path_to_local,
     source::{indent_of, snippet},
 };
 use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexMap};
@@ -13,6 +13,7 @@
 use rustc_lint::{LateContext, LateLintPass, LintContext};
 use rustc_middle::ty::{subst::GenericArgKind, Ty, TypeAndMut};
 use rustc_session::{declare_tool_lint, impl_lint_pass};
+use rustc_span::sym;
 use rustc_span::{symbol::Ident, Span, DUMMY_SP};
 use std::borrow::Cow;
 
@@ -435,7 +436,7 @@ fn has_drop(expr: &hir::Expr<'_>, first_bind_ident: &Ident, lcx: &LateContext<'_
     if let hir::ExprKind::Call(fun, args) = expr.kind
         && let hir::ExprKind::Path(hir::QPath::Resolved(_, fun_path)) = &fun.kind
         && let Res::Def(DefKind::Fn, did) = fun_path.res
-        && match_def_path(lcx, did, &paths::DROP)
+        && lcx.tcx.is_diagnostic_item(sym::mem_drop, did)
         && let [first_arg, ..] = args
         && let hir::ExprKind::Path(hir::QPath::Resolved(_, arg_path)) = &first_arg.kind
         && let [first_arg_ps, .. ] = arg_path.segments
diff --git a/clippy_utils/src/paths.rs b/clippy_utils/src/paths.rs
index e8510987225..0e6f01287b5 100644
--- a/clippy_utils/src/paths.rs
+++ b/clippy_utils/src/paths.rs
@@ -57,7 +57,6 @@
 pub const LATE_LINT_PASS: [&str; 3] = ["rustc_lint", "passes", "LateLintPass"];
 #[cfg(feature = "internal")]
 pub const LINT: [&str; 2] = ["rustc_lint_defs", "Lint"];
-pub const DROP: [&str; 3] = ["core", "mem", "drop"];
 pub const MEM_SWAP: [&str; 3] = ["core", "mem", "swap"];
 #[cfg(feature = "internal")]
 pub const MSRV: [&str; 3] = ["clippy_utils", "msrvs", "Msrv"];