diff --git a/inc/inc.ClassSettings.php b/inc/inc.ClassSettings.php
index d9be038bf..d3860fbd3 100644
--- a/inc/inc.ClassSettings.php
+++ b/inc/inc.ClassSettings.php
@@ -1781,13 +1781,13 @@ class Settings { /* {{{ */
 	 * Check if extension is disabled
 	 *
 	 * @param string $extname name of extension
-	 * @return true if extension is disabled
+	 * @return true if extension is disabled or extension could not be found in configuration
 	 */
 	public function extensionIsDisabled($extname) { /* {{{ */
 		if(array_key_exists($extname, $this->_extensions))
 			return $this->_extensions[$extname]['__disable__'];
 
-		return false;
+		return true;
 	} /* }}} */
 
 	/**