diff --git a/CHANGELOG.md b/CHANGELOG.md
index 29922d5..43e2e50 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -80,7 +80,8 @@ For major (breaking) changes - **version 4, 3 and 2** - see end of page.
 
 | Version        | Date           | Comment  |
 | -------------- | -------------- | -------- |
-| 5.11.25        | 2022-07-11     | `fsSize()` fix iussue filtering (linux) |
+| 5.11.26        | 2022-07-12     | `cpu()` fix iussue parsing physical cores (linux) |
+| 5.11.25        | 2022-07-11     | `fsSize()` fix issue filtering (linux) |
 | 5.11.24        | 2022-07-10     | `fsSize()` fix parsing linux (df) |
 | 5.11.23        | 2022-07-09     | `fsSize()` fixes (linux), `baseboard()` fix (windows), `cpuTemperatur()` fix linux |
 | 5.11.22        | 2022-06-24     | `processes()` improved parsing (linux, mac OS) |
diff --git a/docs/history.html b/docs/history.html
index 44b51b3..5b8970c 100644
--- a/docs/history.html
+++ b/docs/history.html
@@ -57,6 +57,11 @@
                     </tr>
                   </thead>
                   <tbody>
+                    <tr>
+                      <th scope="row">5.11.26</th>
+                      <td>2022-07-12</td>
+                      <td><span class="code">cpu()</span> fix issue parsing physical cores (linux)</td>
+                    </tr>
                     <tr>
                       <th scope="row">5.11.25</th>
                       <td>2022-07-11</td>
diff --git a/docs/index.html b/docs/index.html
index 0ef9104..20e3ee7 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -170,7 +170,7 @@
       <img class="logo" src="assets/logo.png">
       <div class="title">systeminformation</div>
       <div class="subtitle"><span id="typed"></span>&nbsp;</div>
-      <div class="version">New Version: <span id="version">5.11.25</span></div>
+      <div class="version">New Version: <span id="version">5.11.26</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">
@@ -206,7 +206,7 @@
       </div>
       <div class="row number-section">
         <div class="col-xl-4 col-lg-4 col-md-4 col-12">
-          <div class="numbers">15,312</div>
+          <div class="numbers">15,315</div>
           <div class="title">Lines of code</div>
         </div>
         <div class="col-xl-4 col-lg-4 col-md-4 col-12">
diff --git a/lib/cpu.js b/lib/cpu.js
index 09c501a..1f817c4 100644
--- a/lib/cpu.js
+++ b/lib/cpu.js
@@ -719,6 +719,8 @@ function getCpu() {
             result.physicalCores = coresPerSocket ? coresPerSocket * processorsInt : result.cores / threadsPerCoreInt;
             result.processors = processorsInt;
             result.governor = util.getValue(lines, 'governor') || '';
+            result.performanceCores = threadsPerCoreInt > 1 ? result.physicalCores - result.cores : result.cores;
+            result.efficientCores = threadsPerCoreInt > 1 ? result.physicalCores - (threadsPerCoreInt * result.performanceCores) : 0;
 
             // Test Raspberry
             if (result.vendor === 'ARM') {