diff --git a/src/certs.rs b/src/certs.rs
index 9084963..6719e29 100644
--- a/src/certs.rs
+++ b/src/certs.rs
@@ -15,7 +15,7 @@ pub async fn read_certs(
 pub async fn read_dir(path: impl AsRef<Path> + Debug) -> anyhow::Result<Vec<Certificate>> {
     let mut dir = fs::read_dir(path.as_ref())
         .await
-        .context("read certs dir")?;
+        .with_context(|| format!("read certs dir '{:?}'", path.as_ref()))?;
     let mut certs = Vec::new();
     while let Some(entry) = dir.next_entry().await? {
         //TODO: investigate why path().ends_with doesn't work