diff --git a/CRM/Admin/Form/Extensions.php b/CRM/Admin/Form/Extensions.php
index 7f273cb1632f..d17f6e2f9474 100644
--- a/CRM/Admin/Form/Extensions.php
+++ b/CRM/Admin/Form/Extensions.php
@@ -180,12 +180,12 @@ public function postProcess() {
     }
 
     if ($this->_action & CRM_Core_Action::ADD) {
-      CRM_Extension_System::singleton()->getManager()->install(array($this->_key));
+      civicrm_api3('Extension', 'install', array('keys' => $this->_key));
       CRM_Core_Session::setStatus("", ts('Extension Installed'), "success");
     }
 
     if ($this->_action & CRM_Core_Action::ENABLE) {
-      CRM_Extension_System::singleton()->getManager()->enable(array($this->_key));
+      civicrm_api3('Extension', 'enable', array('keys' => $this->_key));
       CRM_Core_Session::setStatus("", ts('Extension Enabled'), "success");
     }
 
diff --git a/CRM/Extension/Manager.php b/CRM/Extension/Manager.php
index bdddca921114..013c9aa9a03b 100644
--- a/CRM/Extension/Manager.php
+++ b/CRM/Extension/Manager.php
@@ -610,7 +610,7 @@ public function findInstallRequirements($keys) {
       $info = @$infos[$key];
 
       if ($this->getStatus($key) === self::STATUS_INSTALLED) {
-        // skip
+        $sorter->add($key, $info->requires);
       }
       elseif ($info && $info->requires) {
         $sorter->add($key, $info->requires);
diff --git a/templates/CRM/Admin/Page/ExtensionDetails.tpl b/templates/CRM/Admin/Page/ExtensionDetails.tpl
index 3b883fd756da..56ca683c5a97 100644
--- a/templates/CRM/Admin/Page/ExtensionDetails.tpl
+++ b/templates/CRM/Admin/Page/ExtensionDetails.tpl
@@ -31,6 +31,20 @@
     <tr>
         <td class="label">{ts}Development stage{/ts}</td><td>{$extension.develStage}</td>
     </tr>
+    <tr>
+        <td class="label">{ts}Requires{/ts}</td>
+        <td>
+            {foreach from=$extension.requires item=ext}
+                {if array_key_exists($ext, $localExtensionRows)}
+                    {$localExtensionRows.$ext.name}
+                {elseif array_key_exists($ext, $remoteExtensionRows)}
+                    {$remoteExtensionRows.$ext.name} (not downloaded)
+                {else}
+                    {$ext} (not installed locally or available remotely)
+                {/if}
+            {/foreach}
+        </td>
+    </tr>
     <tr>
         <td class="label">{ts}Compatible with{/ts}</td>
         <td>
diff --git a/templates/CRM/Admin/Page/Extensions/Main.tpl b/templates/CRM/Admin/Page/Extensions/Main.tpl
index dfc01d59787b..34d38092bc84 100644
--- a/templates/CRM/Admin/Page/Extensions/Main.tpl
+++ b/templates/CRM/Admin/Page/Extensions/Main.tpl
@@ -34,7 +34,7 @@ Depends: CRM/common/enableDisableApi.tpl and CRM/common/jsortable.tpl
         </tr>
         <tr class="hiddenElement" id="crm-extensions-details-{$row.id}">
             <td>
-                {include file="CRM/Admin/Page/ExtensionDetails.tpl" extension=$row}
+                {include file="CRM/Admin/Page/ExtensionDetails.tpl" extension=$row localExtensionRows=$localExtensionRows remoteExtensionRows=$remoteExtensionRows}
             </td>
             <td></td><td></td><td></td><td></td>
         </tr>