diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index fcf107e7..fa6ece76 100755
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -1403,6 +1403,9 @@
     "adjustmentsFunction51": {
         "message": "TPA Breakpoint Adjustment"
     },
+    "adjustmentsFunction52": {
+        "message": "Control Smoothness Adjustment"
+    },
     "adjustmentsSave": {
         "message": "Save"
     },
diff --git a/tabs/adjustments.html b/tabs/adjustments.html
index f5f841a1..01798e28 100644
--- a/tabs/adjustments.html
+++ b/tabs/adjustments.html
@@ -116,6 +116,7 @@
                         <option value="49" i18n="adjustmentsFunction49"></option>
                         <option value="50" i18n="adjustmentsFunction50"></option>
                         <option value="51" i18n="adjustmentsFunction51"></option>
+                        <option value="52" i18n="adjustmentsFunction52"></option>
                 </select></td>
                 <td class="adjustmentSlot"><select class="slot">
                         <option value="0" i18n="adjustmentsSlot0"></option>
diff --git a/tabs/adjustments.js b/tabs/adjustments.js
index 2c1a03b1..714e513a 100644
--- a/tabs/adjustments.js
+++ b/tabs/adjustments.js
@@ -64,7 +64,7 @@ TABS.adjustments.initialize = function (callback) {
 
         // update list of selected functions
         var functionListOptions = $(functionList).find('option');
-        var availableFunctionCount = 52;
+        var availableFunctionCount = 53;
 
         var functionListOptions = $(functionListOptions).slice(0,availableFunctionCount);
         functionList.empty().append(functionListOptions);
diff --git a/tabs/osd.js b/tabs/osd.js
index fa555774..8af48b50 100644
--- a/tabs/osd.js
+++ b/tabs/osd.js
@@ -1546,6 +1546,11 @@ OSD.constants = {
                     id: 117,
                     preview: 'TPA    0\nBP  1500'
                 },
+                {
+                    name: 'CONTROL_SMOOTHNESS',
+                    id: 118,
+                    preview: 'CTL S 3'
+                },
             ]
         },
         {