1 files changed, 1 insertions, 0 deletions
diff --git a/filter.h b/filter.h
index 806965c6..8c1c0df4 100644
--- a/filter.h
+++ b/filter.h
@@ -28,6 +28,7 @@ extern val filters;
 extern val filter_k, lfilt_k, rfilt_k, to_html_k, from_html_k;
 extern val upcase_k, downcase_k, fun_k;
 extern val topercent_k, frompercent_k, tourl_k, fromurl_k;
+extern val tonumber_k, tointeger_k, tofloat_k, hextoint_k;
 
 val trie_lookup_begin(val trie);
 val trie_value_at(val node);