diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3c171f0..3ce8e2e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -65,7 +65,7 @@ jobs:
           - "feat.: stream"
           - "feat.: socks/default-tls"
           - "feat.: socks/rustls-tls"
-          # - "feat.: trust-dns"
+          - "feat.: trust-dns"
 
         include:
           - name: linux / stable
@@ -123,8 +123,8 @@ jobs:
             features: "--features socks"
           - name: "feat.: socks/rustls-tls"
             features: "--features socks,rustls-tls"
-          # - name: "feat.: trust-dns"
-          #   features: "--features trust-dns"
+          - name: "feat.: trust-dns"
+            features: "--features trust-dns"
 
     steps:
       - name: Checkout
diff --git a/src/dns.rs b/src/dns.rs
index 6df4213..e533da1 100644
--- a/src/dns.rs
+++ b/src/dns.rs
@@ -18,7 +18,7 @@ use crate::error::BoxError;
 type SharedResolver = Arc<AsyncResolver<TokioConnection, TokioConnectionProvider>>;
 
 lazy_static! {
-    static ref SYSTEM_CONF: io::Result<(ResolverConfig, ResolverOpts)> = system_conf::read_system_conf();
+    static ref SYSTEM_CONF: io::Result<(ResolverConfig, ResolverOpts)> = system_conf::read_system_conf().map_err(io::Error::from);
 }
 
 #[derive(Clone)]