diff --git a/CHANGELOG.md b/CHANGELOG.md
index 147ca1a..1873590 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,7 @@ For major (breaking) changes - version 3 and 2 see end of page.
 
 | Version        | Date           | Comment  |
 | -------------- | -------------- | -------- |
+| 4.34.8         | 2020-01-25     | `graphics()` controller subid fix (win) |
 | 4.34.7         | 2020-01-13     | `services()` improved service discovery (linux) |
 | 4.34.6         | 2020-01-12     | `networkInterfaces()` catch errors |
 | 4.34.5         | 2020-01-07     | `networkInterfaceDefault()` fixed CMD popup (windows) |
diff --git a/docs/history.html b/docs/history.html
index 5ab66f6..7c379b3 100644
--- a/docs/history.html
+++ b/docs/history.html
@@ -83,6 +83,11 @@
                   </tr>
                 </thead>
                 <tbody>
+                  <tr>
+                    <th scope="row">4.34.8</th>
+                    <td>2020-01-25</td>
+                    <td><span class="code">graphics()</span> controller subid fix (win)</td>
+                  </tr>
                   <tr>
                     <th scope="row">4.34.7</th>
                     <td>2020-01-13</td>
@@ -2069,4 +2074,4 @@
 
 </body>
 
-</html>
+</html>
\ No newline at end of file
diff --git a/docs/index.html b/docs/index.html
index 4af9bcf..f7842e5 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -169,7 +169,7 @@
       <img class="logo" src="assets/logo.png">
       <div class="title">systeminformation</div>
       <div class="subtitle"><span id="typed"></span></div>
-      <div class="version">Current Version: <span id="version">4.34.7</span></div>
+      <div class="version">Current Version: <span id="version">4.34.8</span></div>
       <button class="btn btn-light" onclick="location.href='https://github.com/sebhildebrandt/systeminformation'">View on Github <i class=" fab fa-github"></i></button>
     </div>
     <div class="down">
@@ -208,7 +208,7 @@
         <div class="title">Downloads last month</div>
       </div>
       <div class="col-xl-4 col-lg-4 col-md-4 col-12">
-        <div class="numbers">367</div>
+        <div class="numbers">375</div>
         <div class="title">Dependents</div>
       </div>
     </div>
@@ -366,4 +366,4 @@
   </script>
 </body>
 
-</html>
+</html>
\ No newline at end of file
diff --git a/lib/graphics.js b/lib/graphics.js
index 3a65cc9..84d489a 100644
--- a/lib/graphics.js
+++ b/lib/graphics.js
@@ -720,8 +720,8 @@ function graphics(callback) {
               result.controllers = parseLinesLinuxControllers(lines);
               const nvidiaData = nvidiaDevices();
               // needs to be rewritten ... using no spread operators
-              result.controllers = result.controllers.map(( controller ) => { // match by busAddress
-                return mergeControllerNvidia(controller, nvidiaData.find(({ pciBus }) => pciBus.endsWith(controller.busAddress)) || {} );
+              result.controllers = result.controllers.map((controller) => { // match by busAddress
+                return mergeControllerNvidia(controller, nvidiaData.find(({ pciBus }) => pciBus.endsWith(controller.busAddress)) || {});
               })
             }
             let cmd = "clinfo --raw";
@@ -887,9 +887,13 @@ function graphics(callback) {
         if (sections[i].trim() !== '') {
 
           let lines = sections[i].trim().split('\r\n');
-          let subDeviceId = util.getValue(lines, 'PNPDeviceID', '=').match(/SUBSYS_[a-fA-F\d]{8}/)[0];
-          if (subDeviceId) {
-            subDeviceId = subDeviceId.split('_')[1];
+          let pnpDeviceId = util.getValue(lines, 'PNPDeviceID', '=').match(/SUBSYS_[a-fA-F\d]{8}/);
+          let subDeviceId = null;
+          if (pnpDeviceId) {
+            subDeviceId = pnpDeviceId[0];
+            if (subDeviceId) {
+              subDeviceId = subDeviceId.split('_')[1];
+            }
           }
           controllers.push({
             vendor: util.getValue(lines, 'AdapterCompatibility', '='),