1 files changed, 1 insertions, 0 deletions
diff --git a/src/css.sml b/src/css.sml
index 31c4b9b1..73f180d9 100644
--- a/src/css.sml
+++ b/src/css.sml
@@ -288,6 +288,7 @@ fun summarize file =
                   | DStyle (_, n, s) => (IM.insert (globals, n, (SOME s, [])), classes)
                   | DTask _ => st
                   | DPolicy _ => st
+                  | DOnError _ => st
             end
 
         val (globals, classes) = foldl decl (IM.empty, IM.empty) file