diff --git a/app/destinations/destination_edit.php b/app/destinations/destination_edit.php
index 2bb18f8e69..0527b600c1 100644
--- a/app/destinations/destination_edit.php
+++ b/app/destinations/destination_edit.php
@@ -662,6 +662,9 @@
 					$cache = new cache;
 					$cache->delete("dialplan:".$destination_context);
 					$cache->delete("dialplan:".$destination_context.":".$destination_number);
+					if (isset($destination_prefix)) {
+						$cache->delete("dialplan:".$destination_context.":".$destination_prefix.$destination_number);
+					}
 			}
 
 		//save the outbound destination