diff --git a/clippy_lints/src/utils/mod.rs b/clippy_lints/src/utils/mod.rs
index f7a91fcdd213..8d75e1269630 100644
--- a/clippy_lints/src/utils/mod.rs
+++ b/clippy_lints/src/utils/mod.rs
@@ -1390,7 +1390,7 @@ pub fn fn_has_unsatisfiable_preds(cx: &LateContext<'_, '_>, did: DefId) -> bool
         .predicates
         .iter()
         .filter_map(|(p, _)| if p.is_global() { Some(*p) } else { None })
-        .collect();
+        .collect::<Vec<_>>();
     !traits::normalize_and_test_predicates(
         cx.tcx,
         traits::elaborate_predicates(cx.tcx, predicates)