diff --git a/pkg/controller/appdefinition/router.go b/pkg/controller/appdefinition/router.go
index 7b03e76bc..f81313be8 100644
--- a/pkg/controller/appdefinition/router.go
+++ b/pkg/controller/appdefinition/router.go
@@ -184,7 +184,8 @@ func toNginxConf(routerName string, router v1.Router) (string, string) {
 		buf.WriteString(route.TargetServiceName)
 		buf.WriteString(":")
 		buf.WriteString(strconv.Itoa(port))
-		buf.WriteString(";\n}\n")
+		buf.WriteString(";\n  proxy_set_header X-Forwarded-Host $http_host;")
+		buf.WriteString("\n}\n")
 		if route.PathType == v1.PathTypePrefix && !strings.HasSuffix(route.Path, "/") {
 			buf.WriteString("location ")
 			buf.WriteString(route.Path)
@@ -194,7 +195,8 @@ func toNginxConf(routerName string, router v1.Router) (string, string) {
 			buf.WriteString(route.TargetServiceName)
 			buf.WriteString(":")
 			buf.WriteString(strconv.Itoa(port))
-			buf.WriteString(";\n}\n")
+			buf.WriteString(";\n  proxy_set_header X-Forwarded-Host $http_host;")
+			buf.WriteString("\n}\n")
 		}
 		if route.PathType == v1.PathTypePrefix && route.Path == "/" {
 			buf.WriteString("location ")
@@ -204,7 +206,8 @@ func toNginxConf(routerName string, router v1.Router) (string, string) {
 			buf.WriteString(route.TargetServiceName)
 			buf.WriteString(":")
 			buf.WriteString(strconv.Itoa(port))
-			buf.WriteString(";\n}\n")
+			buf.WriteString(";\n  proxy_set_header X-Forwarded-Host $http_host;")
+			buf.WriteString("\n}\n")
 		}
 	}
 	buf.WriteString("}\n")
diff --git a/pkg/controller/appdefinition/testdata/router/expected.golden b/pkg/controller/appdefinition/testdata/router/expected.golden
index 9c375e1c4..9db7a3406 100644
--- a/pkg/controller/appdefinition/testdata/router/expected.golden
+++ b/pkg/controller/appdefinition/testdata/router/expected.golden
@@ -66,7 +66,7 @@ spec:
         operator: Exists
       volumes:
       - configMap:
-          name: router-name-5f5b2f6b
+          name: router-name-e9cec3df
         name: conf
 status: {}
 
@@ -78,18 +78,21 @@ data:
     listen 8080;
     location = /foo {
       proxy_pass http://foo-target:80;
+      proxy_set_header X-Forwarded-Host $http_host;
     }
     location = /zzzz {
       proxy_pass http://zzz-target:80;
+      proxy_set_header X-Forwarded-Host $http_host;
     }
     location /zzzz/ {
       proxy_pass http://zzz-target:80;
+      proxy_set_header X-Forwarded-Host $http_host;
     }
     }
 kind: ConfigMap
 metadata:
   creationTimestamp: null
-  name: router-name-5f5b2f6b
+  name: router-name-e9cec3df
   namespace: app-created-namespace
 
 ---