diff --git a/CHANGELOG b/CHANGELOG
index 894dbd296..a1966b83a 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -8,6 +8,7 @@
 - add hook documentListPreview
 - various improvements for workflows
 - output splash message when removing, editing, adding a category or keyword
+- extensions cannot be disabled/enabled if configuration file is not writeable
 
 --------------------------------------------------------------------------------
                      Changes in version 5.1.24
diff --git a/views/bootstrap/class.ExtensionMgr.php b/views/bootstrap/class.ExtensionMgr.php
index 601b6b07f..83c7ad423 100644
--- a/views/bootstrap/class.ExtensionMgr.php
+++ b/views/bootstrap/class.ExtensionMgr.php
@@ -226,10 +226,12 @@ class SeedDMS_View_ExtensionMgr extends SeedDMS_Theme_Style {
 				echo "<a href=\"../out/out.Settings.php?currenttab=extensions#".$extname."\" title=\"".getMLText('configure_extension')."\"><i class=\"fa fa-cogs\"></i></a>";
 			if($settings->_enableExtensionDownload)
 				echo "<form style=\"display: inline-block; margin: 0px;\" method=\"post\" action=\"../op/op.ExtensionMgr.php\" id=\"".$extname."-download\">".createHiddenFieldWithKey('extensionmgr')."<input type=\"hidden\" name=\"action\" value=\"download\" /><input type=\"hidden\" name=\"extname\" value=\"".$extname."\" /><a class=\"download\" data-extname=\"".$extname."\" title=\"".getMLText('download_extension')."\"><i class=\"fa fa-download\"></i></a></form>";
-			if(!$settings->extensionIsDisabled($extname)) {
-				echo ' <a href="#" class="toggle" data-extname="'.$extname.'" title="'.getMLText('disable_extension').'"><i class="fa fa-check"</i></a>';
-			} else {
-				echo ' <a href="#" class="toggle" data-extname="'.$extname.'" title="'.getMLText('enable_extension').'"><i class="fa fa-minus"></i></a>';
+			if(is_writeable($settings->_configFilePath)) {
+				if(!$settings->extensionIsDisabled($extname)) {
+					echo ' <a href="#" class="toggle" data-extname="'.$extname.'" title="'.getMLText('disable_extension').'"><i class="fa fa-check"</i></a>';
+				} else {
+					echo ' <a href="#" class="toggle" data-extname="'.$extname.'" title="'.getMLText('enable_extension').'"><i class="fa fa-minus"></i></a>';
+				}
 			}
 			echo "</div>";
 			echo "</td>";
@@ -277,6 +279,9 @@ class SeedDMS_View_ExtensionMgr extends SeedDMS_Theme_Style {
 			else
 				echo "<div class=\"alert alert-warning\">".getMLText('extension_mgr_upload_disabled')."</div>";
 		}
+		if(!is_writeable($settings->_configFilePath)) {
+			$this->warningMsg(getMLText("extension_mgr_no_toggle"));
+		}
 		$this->columnEnd();
 		$this->columnStart(8);
 ?>