diff --git a/multiple-instances.md b/multiple-instances.md
index 00386e1b..a0822739 100644
--- a/multiple-instances.md
+++ b/multiple-instances.md
@@ -180,6 +180,7 @@ apt install --no-install-recommends qemu-system qemu-utils libvirt-clients libvi
     # Virtual machine #1 - "example1-com"
     https://[DOMAIN_NAME_1]:8443 {
         reverse_proxy https://[IP_ADDRESS_1]:8080 {
+            header_up Host {host}
             transport http {
                 tls_insecure_skip_verify
             }
@@ -192,6 +193,7 @@ apt install --no-install-recommends qemu-system qemu-utils libvirt-clients libvi
     # Virtual machine #2 - "example2-com"
     https://[DOMAIN_NAME_2]:8443 {
         reverse_proxy https://[IP_ADDRESS_2]:8080 {
+            header_up Host {host}
             transport http {
                 tls_insecure_skip_verify
             }
diff --git a/reverse-proxy.md b/reverse-proxy.md
index bdeb3244..5b15f2b3 100644
--- a/reverse-proxy.md
+++ b/reverse-proxy.md
@@ -1134,6 +1134,7 @@ If you want to also access your AIO interface publicly with a valid certificate,
 ```
 https://<your-nc-domain>:8443 {
     reverse_proxy https://localhost:8080 {
+        header_up Host {host}
         transport http {
             tls_insecure_skip_verify
         }