diff --git a/src/applications/transactions/view/PhabricatorApplicationTransactionCommentView.php b/src/applications/transactions/view/PhabricatorApplicationTransactionCommentView.php
--- a/src/applications/transactions/view/PhabricatorApplicationTransactionCommentView.php
+++ b/src/applications/transactions/view/PhabricatorApplicationTransactionCommentView.php
@@ -451,6 +451,7 @@
       $action_select = id(new AphrontFormSelectControl())
         ->addClass('phui-comment-fullwidth-control')
         ->addClass('phui-comment-action-control')
+        ->setAriaLabel(pht('Comment Action Options'))
         ->setID($action_id)
         ->setOptions($options);
 
diff --git a/src/view/form/control/AphrontFormControl.php b/src/view/form/control/AphrontFormControl.php
--- a/src/view/form/control/AphrontFormControl.php
+++ b/src/view/form/control/AphrontFormControl.php
@@ -3,6 +3,7 @@
 abstract class AphrontFormControl extends AphrontView {
 
   private $label;
+  private $ariaLabel;
   private $caption;
   private $error;
   private $name;
@@ -52,6 +53,20 @@
     return $this;
   }
 
+  /**
+   * Explicitly set an aria-label attribute for accessibility. Only to be used
+   * when no visible label is already set via setLabel().
+   * @param string $aria_label aria-label text to add to the form control
+   */
+  public function setAriaLabel($aria_label) {
+    $this->ariaLabel = $aria_label;
+    return $this;
+  }
+
+  public function getAriaLabel() {
+    return $this->ariaLabel;
+  }
+
   public function getLabel() {
     return $this->label;
   }
diff --git a/src/view/form/control/AphrontFormSelectControl.php b/src/view/form/control/AphrontFormSelectControl.php
--- a/src/view/form/control/AphrontFormSelectControl.php
+++ b/src/view/form/control/AphrontFormSelectControl.php
@@ -28,9 +28,10 @@
       $this->getValue(),
       $this->getOptions(),
       array(
-        'name'      => $this->getName(),
-        'disabled'  => $this->getDisabled() ? 'disabled' : null,
-        'id'        => $this->getID(),
+        'name'       => $this->getName(),
+        'disabled'   => $this->getDisabled() ? 'disabled' : null,
+        'id'         => $this->getID(),
+        'aria-label' => $this->getAriaLabel(),
       ),
       $this->disabledOptions);
   }