diff --git a/src/types/request.rs b/src/types/request.rs
index f3e3801..d14d052 100644
--- a/src/types/request.rs
+++ b/src/types/request.rs
@@ -57,8 +57,11 @@ impl Request {
             )
                 .context("Request URI is invalid")?
                 .into_owned(),
-            headers.get("TLS_CLIENT_HASH").map(hash_decode)
-                .ok_or(anyhow!("Received malformed TLS client hash from upstream.  Expected 256 bit hex or b64 encoded"))?,
+            match headers.get("TLS_CLIENT_HASH").map(hash_decode) {
+                Some(maybe_hash @ Some(_))  => maybe_hash,
+                Some(None) => bail!("Received malformed TLS client hash from upstream.  Expected 256 bit hex or b64 encoded"),
+                None => None,
+            },
             headers.get("SCRIPT_PATH")
                 .or_else(|| headers.get("SCRIPT_NAME"))
                 .cloned()