diff --git a/maps.proto b/maps.proto
index 94a4325..d78bbdb 100644
--- a/maps.proto
+++ b/maps.proto
@@ -38,7 +38,7 @@ message MapRequest {
 }
 
 message MapFilter {
-  int64 ID = 1;
+  optional int64 ID = 1;
   optional string DisplayName = 2;
   optional string Creator = 3;
   optional int32 GameID = 4;