diff --git a/outpost/pkg/proxy/oauth.go b/outpost/pkg/proxy/oauth.go
index 93a103241..9ee0bcadd 100644
--- a/outpost/pkg/proxy/oauth.go
+++ b/outpost/pkg/proxy/oauth.go
@@ -184,7 +184,7 @@ func (p *OAuthProxy) OAuthCallback(rw http.ResponseWriter, req *http.Request) {
 		return
 	}
 
-	session, err := p.redeemCode(req.Context(), getHost(req), req.Form.Get("code"))
+	session, err := p.redeemCode(req.Context(), req.Host, req.Form.Get("code"))
 	if err != nil {
 		p.logger.Errorf("Error redeeming code during OAuth2 callback: %v", err)
 		p.ErrorPage(rw, http.StatusInternalServerError, "Internal Server Error", "Internal Error")