diff --git a/crates/ruff_linter/src/checkers/ast/analyze/expression.rs b/crates/ruff_linter/src/checkers/ast/analyze/expression.rs
index 3902f266d0..49819cfb66 100644
--- a/crates/ruff_linter/src/checkers/ast/analyze/expression.rs
+++ b/crates/ruff_linter/src/checkers/ast/analyze/expression.rs
@@ -974,6 +974,7 @@ pub(crate) fn expression(expr: &Expr, checker: &mut Checker) {
                 Rule::OsPathIsabs,
                 Rule::OsPathJoin,
                 Rule::OsPathBasename,
+                Rule::OsPathDirname,
                 Rule::OsPathSamefile,
                 Rule::OsPathSplitext,
                 Rule::BuiltinOpen,