diff --git a/src/Filter.h b/src/Filter.h
index 0482d8b48..a1600e95f 100644
--- a/src/Filter.h
+++ b/src/Filter.h
@@ -35,10 +35,9 @@
 enum FilterKind {
 	fDefault,
 	fDFS,
+	MAX_FILTER_KIND_SIZE,
 };
 
-#define MAX_FILTER_KIND_SIZE ((FilterKind) (fDFS + 1))
-
 // Filter base class
 class Filter
 {