diff --git a/ccp/js/executionhistorycontroller.js b/ccp/js/executionhistorycontroller.js
index df11852..f0547e2 100644
--- a/ccp/js/executionhistorycontroller.js
+++ b/ccp/js/executionhistorycontroller.js
@@ -107,6 +107,7 @@ class CCPExecutionHistory extends HTMLElement {
                     <div class="d-flex float-right" style="gap: 3px;">
                       <select name="language-selector" class="form-control" style="height:inherit;padding:2px">
                         <option value="text/python" data-ext="py" title="Generate plain Python3">Python 3</option>
+                        <option value="text/plain+r" data-ext="r" title="Generate plain R">R</option>
                         <option value="application/vnd.jupyter+python" data-ext="ipynb" title="Generate Jupyter notebook with Python 3 cells">Jupyter Python3</option>
                       </select>
                       <button data-index="0" name="codegen" title="Generate code" class="btn btn-primary ccp-toolbar-button ccp-toolbar-button-small">