diff --git a/admin_manual/installation/nginx.rst b/admin_manual/installation/nginx.rst
index 473e4da59..581232ca7 100644
--- a/admin_manual/installation/nginx.rst
+++ b/admin_manual/installation/nginx.rst
@@ -61,8 +61,7 @@ webroot of your nginx installation. In this example it is
       # Add headers to serve security related headers
       # Before enabling Strict-Transport-Security headers please read into this
       # topic first.
-      # add_header Strict-Transport-Security "max-age=15768000;
-      # includeSubDomains; preload;";
+      # add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;";
       #
       # WARNING: Only add the preload option once you read about
       # the consequences in https://hstspreload.org/. This option
@@ -316,8 +315,7 @@ your nginx installation.
               # to have those duplicated to the ones above)
               # Before enabling Strict-Transport-Security headers please read
               # into this topic first.
-              # add_header Strict-Transport-Security "max-age=15768000;
-              # includeSubDomains; preload;";
+              # add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;";
               add_header X-Content-Type-Options nosniff;
               add_header X-XSS-Protection "1; mode=block";
               add_header X-Robots-Tag none;