diff --git a/nselib/data/http-fingerprints.lua b/nselib/data/http-fingerprints.lua
index e5f53e4e7..e660bd4a2 100644
--- a/nselib/data/http-fingerprints.lua
+++ b/nselib/data/http-fingerprints.lua
@@ -4302,6 +4302,22 @@ table.insert(fingerprints, {
 -- These checks will find specific installed software. If possible, it will also
 -- find versions, etc.
 
+table.insert(fingerprints, {
+    category = 'security',
+    probes = {
+    {
+        path = '/CSS/Miniweb.css',
+        method = 'GET'
+      }
+    },
+    matches = {
+      {
+        match = 'ad_header_form_sprachauswahl',
+        output = 'SCADA Siemens SIMATIC S7'
+      }
+    }
+  });
+
 table.insert(fingerprints, {
     category = 'security',
     probes = {