diff --git a/ext/liquid/variable.h b/ext/liquid/variable.h
index ba299c8..4be1ac4 100644
--- a/ext/liquid/variable.h
+++ b/ext/liquid/variable.h
@@ -3,18 +3,9 @@
 
 #include <regex.h>
 
-enum error_mode {
-    STRICT,
-    LAX,
-    WARN
-};
-
 struct liquid_variable {
     char *markup; long markup_len;
     char *name; long name_len;
-    enum error_mode e_mode;
-    char **filters;
-    int *filter_len;
 };
 
 void init_liquid_variable();